ACADEMIC HAND BOOK 2017-2018 III B. TECH ME I SEMESTERvnrvjiet.ac.in/download/academicplans/III-1me.pdf · Number of working days: 90 Number of Hours/week: 3 Total number of periods

VALLURUPALLI NAGESWARA RAO VIGNANA JYOTHI INSTITUTE OF ENGINEERING & TECHNOLOGY

AN AUTONOMOUS INSTITUTE

(Approved by AICTE - New Delhi, Govt. of A.P.)

Accredited by NBA and NAAC with ‘A’ Grade

Vignana Jyothi Nagar, Bachupally, Nizampet (S.O.), Hyderabad-500 090. A.P., India.

ACADEMIC HAND BOOK

2017-2018

III– B. TECH ME

I SEMESTER

VNR VIGNANA JYOTHI INSTITUTE OF ENGINEERING AND TECHNOLOGY

AN AUTONOMOUS INSTITUTE

VISION

A Deemed University of Academic Excellence, for National and International Students Meeting

global Standards with social commitment and Democratic Values

MISSION

To produce global citizens with knowledge and commitment to strive to enhance quality of life

through meeting technological, educational, managerial and social challenges

QUALITY POLICY

• Impart up to date knowledge in the students chosen fields to make them quality Engineers

• Make the students experience the applications on quality equipment and tools.

• Provide quality environment and services to all stock holders.

• Provide Systems, resources and opportunities for continuous improvement.

• Maintain global standards in education, training, and services


BACHUPALLY, NIZAMPET (S.O), HYDERABAD – 500090

LESSON PLAN: 2017-18

III B. Tech : I Sem : ME-1 L T/P/D C

3 0 3

Course Name: Production Technology Course Code: 5ME07

Names of the Faculty Member: A N Brahmeswara Rao

Number of working days: 90

Number of Hours/week: 3

Total number of periods planned: 60

1. PREREQUISITES

Metallurgy and Material science(5ME03), Manufacturing Science

2. COURSE OBJECTIVES

CO1: Understand about sand casting and metal casting techniques.

CO2: Impart the knowledge of various welding processes.

CO3: Understand about the importance rolling, forging and sheet metal operations.

CO4: Understand about the processing of plastics.

3. COURSE OUTCOMES (COs)

Upon completion of this course the student is able to

1) Analyze and select the suitable casting technique for making the components.

2) Analyze the different types of welding processes are needed for various materials and importance of welding.

3) Know the methods involved in sheet metal operations, rolling, forging etc.

4) Know the various manufacturing methods in processing of plastics.

VNR VJIET/ACADEMICS/2017/Formats/ I

4. MAPPING OF COs WITH POs

Course

Outcomes

(COs)

Program Outcomes (POs)

a b c d e f g h i j k l

CO 1 3 1 1

2 1 1

2

2

CO 2 3 1 1

2 1 1

2

2

CO 3 3 1 1

2 1 1

2

2

CO 4 3 1 1

2 1 1

2

2

3: High correlation, 2: Moderate correlation and 1: Low Correlation

5. LEARNING RESOURCES

(i) TEXT BOOKS

T1 – Manufacturing Technology by P.N.Rao

T2 –Production Technology by R.K.jain

(ii) REFERENCES (Publications/ Open Learning Resources)

R1 - Manufacturing Engineering and Technology by Kalpak Jian S

R2 - Process and Materials of Manufacturing by Lindberg/PE

R3 - Principles of Metal Castings by Rosenthal

R4 - Welding Process by Parmar

R5 – Production technology by PC Sharma

R6 – Fundamentals of modern manufacturing, MP Groover

R7 – A text book of manufacturing technology, RK Rajput

(a) Publications- Nil (this subject being a basic and conceptual course, no publications are referred)

(b) Open Learning Resources for self learning

L1. http://nptel.ac.in/courses/112107084/ (Castings)

L2. http://nptel.ac.in/courses/112107090/ (Welding)

L3. http://nptel.ac.in/courses/112106153/ (Forming)

L4. https://www.youtube.com/ (videos)

(iii) JOURNALS

J1. International Journal of Metalcasting - Springer J2. International Journal of Material Forming - Springer Link J3. International Journal of Materials Forming and Machining Processes (www.igi-global.com)

J4. International Journal of Plastics Technology - Springer

J5. Journal of Manufacturing Processes - Elsevier

6. DELIVERY METHODOLOGIES

DM1: Chalk and Talk DM4: Demonstration (Physical / Laboratory / Audio Visuals) DM8: PPT

7. PROPOSED FIELD VISITS/ GUEST LECTURE BY INDUSTRY EXPERT

Field Visit: As a part of class, field visit is scheduled to Thermal Systems industry in Sept’2017.

8. ASSESSMENT

http://nptel.ac.in/courses/112107084/



https://www.youtube.com/

https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0ahUKEwintbGW5MDVAhVBro8KHTmuCXoQFgg5MAM&url=http%3A%2F%2Fwww.springer.com%2Fmaterials%2Fspecial%2Btypes%2Fjournal%2F40962&usg=AFQjCNEGVHeDFMRwwR7RtKOQBfBSDK66Gw

http://www.springerlink.com/openurl.asp?genre=journal&issn=1960-6206

http://www.irma-international.org/journal/international-journal-materials-forming-machining/69666/

http://www.igi-global.com/

http://www.springer.com/chemistry/polymer+science/journal/12588

https://www.journals.elsevier.com/journal-of-manufacturing-processes/

AM1: Semester End Examination . AM2: Mid Term Examination

AM3: Home Assignments

9. WEIGHTAGES FOR PROPOSED ASSESSMENT METHODOLOGIES

R15

S. No. Assessment Methodology Weightages in marks for the

courses with Course project

Weightages in marks for

the courses without

Course project

1. Home Assignments (AM3)

10% 10

2. Quizzes (AM6)

3. Course project (AM7) -

4. Mid Term Examination (AM2) 30

5. Semester End Examination (AM1) 60

(i) HOME ASSIGNMENTS- will be issued after completion of 2 units and 4 units, (will be included after they are issued)

a) Assignment one (2 ½ units)

1) List and explain different types of pattern allowances? 2) Explain die casting process? Describe the Hot chamber and cold chamber die casting processes

3) Explain the arc welding process in detail?

4) Write notes on MIG welding process? 5) What are the different types of rolling mills? Explain with neat sketches.

10. SIMULATION SOFTWARES (If any) - nil

11. DETAILED COURSE DELIVERY PLAN

UNIT –I

CASTING:

Steps involved in making a casting; Advantage of casting and its applications; Types of Foundry sands, Types of patterns – Materials used

for patterns; Pattern allowances and their construction; Principles of Gating, Gating ratio and design of gating systems. Risers; Types;

Casting design considerations;

Special casting processes: Centrifugal, Die, Investment casting only, Cupola furnace and Electric arc furnace only.

Learning Objectives: After completion of the unit, the student must able to:

1. Understand the process sequence of making a casting

2. Knowledge of various types of pattern allowances and its importance

3. Understand different types of gates and gating ratios

4. Knowledge of various casting design considerations

5. Understand the functions of runners and risers

6. Understand various types of special casting processes and their application

7. Know the types of furnaces, construction of Cupola & Electric arc furnace

TEACHING PLAN

S.

No. Contents of syllabus to be taught

No. of

Lec

ture

Per

iods Lecture

Dates

Proposed

Delivery

Methodolo

gies

Learning Resources /

References

Course

Outcomes

1 Introduction to production technology-

casting, welding and other mfg. processes

2 3/07/17 &

4/07/17

DM 8,

DM1 &

DM4

R6, T1, L1 CO 1

2 Steps involved in making a casting 1 05/07/17 DM8, DM1 R6, T1 CO 1

3 Advantage of casting and its applications 1 07/07/17 DM8, DM1 T1 CO 1

4 Types of Foundry sands 1 10/07/17 DM 8,

DM1 &

DM4

R6, R7, T1 CO 1

5 Types of patterns – Materials used for

patterns

1 11/07/17 DM8, DM1 T1, R6, L4 CO 1

6 Pattern allowances and their construction 1 12/07/17 DM8, DM1 T1 CO 1

7 Principles of Gating, Gating ratio and

design of gating systems

2 14/07/17 &

18/07/17

DM 8,

DM1 &

DM4

T1, R6, L4 CO 1

8 Risers- function and Types of risers 1 19/07/17 DM8, DM1 T1, R6 CO 1

9 Casting design considerations; 1 21/07/17 DM 8,

DM1 &

DM4

T1, R6, L4 CO 1

10 Centrifugal casting 1 24/07/17 DM8, DM1 T1, R6 CO 1

11 Die casting 1 25/07/17 DM8, DM1 T1, R6 CO 1

12 Investment casting 1 26/07/17 DM8, DM1 T1, R6 CO 1

13 Cupola furnace and Electric arc furnace 2 28/07/17 &

31/07/17

DM 8,

DM1 &

DM4

T1, R6, L4 CO 1

TOTAL hours 16

UNIT- II

WELDING:

Classification of welding processes, types of welds and welded joints ,Gas welding, ARC welding, Resistance welding, Thermit welding

and Plasma welding.

TIG & MIG welding, Friction stir welding, Explosive welding, Soldering & Brazing. Heat affected zones in welding; welding defects.


1. Understand various types of welding processes

2. Know about various types of weldments and welded joints

3. Understand various welding processes (principles & methods)- Gas welding, arc welding, TIG, MIG welding, Friction stir welding,

Resistance welding, Explosive welding, and Soldering & brazing.

4. Knowledge of various welding defects

TEACHING PLAN

S.


No. of

Lec

ture

Per

iods Lecture

Dates

Proposed

Delivery

Methodolo

gies


References

Course

Outcomes

1 Introduction about welding processes 1 01/08/17 DM 8,

DM1 &

DM4

T1, R6, L4 CO 2

2 Classification of Welding processes 1 02/08/17 R6, T1, L2 CO 2

3 types of welds and welded joints 1 07/08/17 R6, T1, L2 CO 2

4 Gas welding 1 08/08/17 DM 8,

DM1 &

DM4

T1, R6, L4 CO 2

5 ARC welding 1 09/08/17 R6, T1, L2 CO 2

6 Resistance welding 1 11/08/17 DM 8,

DM1 &

DM4

T1, R6, L4 CO 2

7 Thermit welding 1 16/08/17 R6, T1, L2 CO 2

8 Plasma welding 1 18/08/17 R6, T1, L2 CO 2

9 TIG welding & MIG welding 1 21/08/17 DM 8,

DM1 &

DM4

T1, R6, L4 CO 2

10 Friction stir welding 1 22/08/17 DM8,

DM1

R6, T1, L2 CO 2

11 Explosive welding 1 23/08/17 DM8,

DM1

R6, T1, L2 CO 2

12 Soldering & Brazing 1 28/08/17 DM8,

DM1

R6, T1, L2 CO 2

13 Heat affected zones in welding 1 29/08/17 DM8,

DM1

R6, T1, L2 CO 2

14 Welding defects 1 30/08/17 DM8,

DM1

R6, T1, L2 CO 2

TOTAL hours 14

UNIT- III

MECHANICAL WORKING -1:

Hot working; Cold working; Strain hardening; Recovery; Recrystallization and grain growth; Comparison of properties of cold and hot

worked parts.

ROLLING:

Rolling fundamentals; Theory of rolling; Types of Rolling mills and products;

EXTRUSION:

Basic extrusion process and its characteristics; Hot extrusion and Cold extrusion; Forward extrusion and backward extrusion – Impact

extrusion; Hydrostatic extrusion; Extrusion defects.

FORGING PROCESSES:

Principles of Forging; Tools and dies; Types of Forging; Smith forging; Drop Forging; Roll Forging; Rotary Forging; Forging defects.


1. Know the types of metal forming processes

2. Understanding of recovery, Recrystallisation and grain growth

3. Understand the difference between hot working and cold working processes

4. Understand the theory of rolling

5. Knowledge of types of rolling milling and rolling products

6. Understand types of extrusion processes and its defects

7. Understand principle of forging & forging techniques, tools and dies used in forging

8. Study various forging defects

TEACHING PLAN

S.


No. of

Lec

ture

Per

iods Lecture

Dates

Proposed

Delivery

Methodologies

Learning

Resources /

References

Course

Outcomes

1 Introduction about metal forming 0.5 30/08/17 DM8, DM1 R6, T1, L3 CO 3

2 Hot working and cold working & Strain

hardening

0.5 30/08/17 DM 8, DM1 &

DM4

R6, T1, L3, L4 CO 3

3 Recovery, Recrystallisation and grain

growth

0.5 01/09/17 DM8, DM1 R6, T1, L3 CO 3

4 Comparison of properties of cold and hot

worked parts. Theory of rolling, rolling

products

0.5 01/09/17 DM8, DM1 R6, T1, L3 CO 3

5 Theory of rolling 1 11/09/17 DM8, DM1 R6, T1, L3 CO 3

6 Types of Rolling mills and products 1 12/09/17 DM8, DM1 R6, T1, L3 CO 3

7 Basic extrusion process and its

characteristics

1 13/09/17 DM8, DM1 R6, T1, L3 CO 3

8 Hot extrusion and Cold extrusion;

Forward extrusion and backward extrusion

2 15/09/17

&

18/09/17

DM 8, DM1 &

DM4

R6, T1, L3, L4 CO 3

9 Impact extrusion; Hydrostatic extrusion; 2 19/09/17

&

DM 8, DM1 & R6, T1, L3, L4 CO 3

Extrusion defects 22/09/17 DM4

10 Principles of Forging 1 25/09/17 DM8, DM1 R6, T1, L3 CO 3

11 Tools and dies 1 26/09/17 DM8, DM1 R6, T1, L3 CO 3

12 Smith forging; Drop Forging; Roll

Forging; Rotary Forging

2 27/09/17

&

03/10/17

DM8, DM1 R6, T1, L3 CO 3

13 Forging defects 1 04/10/17 DM8, DM1 R6, T1, L3 CO 3

TOTAL hours 14

UNIT- IV

MECHANICAL WORKING -2:

Stamping, forming and other cold working processes: Blanking and piercing; Bending and forming; Drawing and its types; Wire drawing

and Tube drawing; Coining; Hot and cold spinning


1. Understand various types of metal forming processes

2. Knowledge of various sheet metal operations

3. Understand the types of drawing (principles and processes)- wire drawing and tube drawing

4. Understand the processes of Coining, hot & cold spinning process

TEACHING PLAN

S.


No. of

Lec

ture

Per

iods Lecture

Dates

Proposed Delivery

Methodologies

Learning

Resources /

References

Course

Outcome

s

1 Introduction to sheet metal operations 1 06/10/17 DM8, DM1 R6, T1, L3 CO 3

2 Stamping, forming and other cold working

processes

2 9/10/17

&

DM8, DM1 R6, T1, L3 CO 3

10/10/17

3 Blanking and piercing; Bending and forming 2 11/10/17

&

13/10/17

DM8, DM1 R6, T1, L3 CO 3

4 Drawing and its types 1 16/10/17 DM8, DM1 R6, T1, L3 CO 3

5 Wire drawing and tube drawing 2 17/10/17

&

20/10/17

DM 8, DM1 &

DM4

R6, T1, L3, L4 CO 3

6 Coining; Hot and cold spinning 1 23/10/17 DM 8, DM1 &

DM4

R6, T1, L3, L4 CO 3

TOTAL hours 9

UNIT- V

PLASTIC MATERIALS AND PROCESSES:

Types of plastics; advantages of plastics, Injection moulding; Blow moulding; Thermoforming. Compression moulding.


1. Understand the types of plastic materials their applications, and advantages

2. Understand the molding processes – Injection molding and Blow molding.

3. Understand the thermo forming and compression molding processes

TEACHING PLAN

S.

N

o.

Contents of syllabus to be taught

No. of

Lec

ture

Per

iods Lecture

Dates

Proposed Delivery

Methodologies

Learning

Resources /

References

Course

Outcome

s

1 Introduction to sheet metal operations 1 06/10/17 DM8, DM1 R6, T1, L3 CO 3

2 Stamping, forming and other cold working 2 9/10/17 DM8, DM1 R6, T1, L3 CO 3

processes &

10/10/17

3 Blanking and piercing; Bending and forming 2 11/10/17

&

13/10/17

DM8, DM1 R6, T1, L3 CO 3

4 Drawing and its types 1 16/10/17 DM8, DM1 R6, T1, L3 CO 3

5 Wire drawing and tube drawing 2 17/10/17

&

20/10/17

DM 8, DM1 &

DM4

R6, T1, L3, L4 CO 3

6 Coining; Hot and cold spinning 1 23/10/17 DM 8, DM1 &

DM4

R6, T1, L3, L4 CO 3

TOTAL hours 9

12. MODEL QUESTION PAPER

VNR VIGNANA JYOTHI INSTITUTE OF ENGINEERING & TECHNOLOGY

(AN AUTONOMOUS INSTITUTE)

III B.TECH. I SEMESTER REGULAR EXAMINATION-2018

SUBJECT: PRODUCTION TECHNOLOGY

(ME, AE)

Time: 3 Hours Max. Marks: 60

------------------------------------------------------------------------------------------------------------------------------------------------------------------

PART-A

1. Answer the following 2×10 =20 Marks

i. What is a mould? explain briefly. CO1

ii. Explain why sprue should be tapered CO1

iii. List the types of welds CO2

iv. What are the different types of resistance welding, list them. CO2

v. Define Hot working and cold working. CO3

vi. What are the causes of forging defects? list at least 4 causes. CO3

vii. Differentiate between blanking and piercing CO3

viii. Explain briefly Coining and Embossing, and what is the difference CO3

ix. What is a monomer and a polymer? Explain briefly. CO4

x. What is calendaring used for? Explain the process briefly CO4

Part-B

Subject Code

5ME07

R15

Answer the following questions 5×8=40 Marks

UNIT I

1. What is a casting process? List and describe the steps with a flow diagram, explain each step. CO 1

(OR)

2. What are the different types of furnaces used in foundry? Draw a neat diagram of Cupola . CO 1

UNIT II

3. Explain the gas welding process in detail with a neat diagram. CO 2

(OR)

4. What is principle of inert gas welding? Explain the process of MIG welding with a neat sketch. CO 2

UNIT III

5. Compare the properties of hot working and cold working. CO 3

(OR)

6. Classify the extrusion processes briefly? Explain the hydrostatic extrusion process with neat diagram. CO 3

UNIT IV

7. List different drawing processes in bulk forming? Explain tube drawing in detail with neat diagrams CO 3

(OR) 8. Classify the sheet metal forming methods? List and explain the sheet metal cutting operations. CO 3

UNIT V

9. What are the plastics? Explain the types of plastics and their applications. CO 4

(OR)

10. List and explain the blow moulding processes with neat diagrams. CO 4

--- --- ---




A Good Lesson Plan is instrumental for the delivery of course content in a competent way so that students get benefited in view of

learning, developing good skill set, updating with current trends in industry etc., Delivery including latest trends in the technology and

applications brings deep insight of the course in students. As the plan includes the home assignments, quizzes, course projects etc., it

carries out the continuous assessment of student learning (course outcomes).

The course delivery in adherence to the lesson plan is ensured through course level audit forms on regular basis.

III B. Tech : I Sem : ME-1 L T/P/D C

3 1 4

Course Name: Dynamics of Machinery Course Code: 5ME08

Names of the Faculty Member: H Naresh / CH Naveen Reddy




1. PREREQUISITES

Mechanical Engineering Design - I (5ME09), Mechanical Engineering Design -II (5ME13), Kinematics of Machinery (5ME05)


(Objectives define the importance of course and how the course is helpful to the students in their career. Objectives

must be defined first and contents must be developed later.)

The student should be able

• Study the construction methods like Klien’s, velocity polygons, acceleration diagrams etc for drawing various mechanisms.

• Identify the significance of the principles of equilibrium, super position, virtual work& D’Alembert’s principle.

• Familiarize with the methods of static &dynamic stability.

• Study the Mechanical vibrations on various systems.



(Outcomes define what the student will be able to do upon completion of the course. Course outcomes must be

assessable. The blooms taxonomy terms are used as reference in defining course outcomes)


• Show the engineering applications involving the selection and design of machine components with respect to the forces

developed.

• Check whether the proposed design is satisfactory.

• Analyze and design flywheels, governors and gyroscopes to withstand forces.

• Analyze the different vibration system using equilibrium, energy, Rayleigh’s dunker’s, etc method.


(This mapping represents the contribution of course in attaining the program outcomes and there by program

educational objectives. This also helps in strengthening the curriculum towards the improvement of program.)

Course

Outcomes

(COs)



CO 1 2 3 2 2 1 2 2 3 2

CO 2 3

1 3 3

CO 3 2 3 2 2 2 3 2 2 2 3



(i) TEXT BOOKS

T1 Theory of Machines by Thomas Bevan; Publisher: Pearson Education. T2 Theory of Machines by S. S. Ratan; Publisher: Tata McGraw Hill.


(Course delivery including latest trends brings good insight of the course in students and also inculcates the habit of self

learning among the students.

Publications referred can be given unit wise or at course level.)

(a) Publications

Unit II

R1 Theory of Machines and Mechanisms by P. L. Ballaney; Publisher: Khanna.

R2 Mechanism and Machine Theory by J. S. Rao and R. V. Dukkipati; Publisher: New Age.

R3 Kinematics and Dynamics of Machinery by R. L. Norton; Publisher: McGraw Hill.

R4 Theory of Machines and Mechanisms by Uicker, Pennock & Shigley; Publisher: Oxford.


L1. http://nptel.ac.in/courses/112104121/1

L2. https://www.youtube.com/watch?v=mVvnEeDb3aA

L3. https://www.youtube.com/watch?v=FydJu1A1oeM

L4: https://www.youtube.com/watch?v=w-KtSxnMsMQ&t=72s

(iii) JOURNALS

J1. ELSEVIER Journal on Theoru of Machine.

J2. ELSEVIER Journal on Mechanisms

J3. SCOPUS Journal on Mechanisms.

J4. Scince Direct Journal on Theoru of Machine..


(Depending on the suitability to the delivery of concept, one or more among the following delivery methodologies are

adopted to engage the student in learning)

DM1: Chalk and Talk DM5: Open The Box Videos and PPTs

DM3: Collaborative Learning (Think Pair Share, POGIL, etc.) DM7: Group Project

DM4: Demonstration (Physical / Laboratory / Audio Visuals)

https://www.youtube.com/watch?v=mVvnEeDb3aA


(To be added for the courses as directed by the department.)

Guest Lecture: "Application of DYNAMICS OF MACHINERY and Theory of machinery from industry Experts

(And / Or)

Field Visit: As a part of class, field visit is scheduled to SHIGEMI SCINTIFIC SOLUTIONS. And DESIGN TECH SYSTEMS LIMITED

8. ASSESSMENT

(As per Regulations, AM1 and AM2 are compulsory for assessment. Whereas, any two or more assessment

methodologies can be considered from AM3 to AM9 under assignment towards continuous assessment of the

performance of students.)


AM3: Home Assignments AM6: Quizzes

AM7: Course Projects**

** (To be added for the courses as directed by the department. The no. of course projects is left to the liberty of faculty)


(The allotted marks for home assignments, quizzes and etc., except course projects are left to the liberty of faculty. But

for the finalisation of assignment marks, the following weightages can be considered.)

R15




the courses without

Course project

1. Home Assignments (AM3) 3% 10 5% 10

2. Quizzes (AM6) 3% 5%

3. Course project (AM7) 4% -

4. Mid Term Examination (AM2) 20 20

5. Semester End Examination (AM1) 70 70

(i) HOME ASSIGNMENTS

On the beginning day of each unit, home assignment sheet is given to the students and the solution sheet for the same is expected after

two days of the completion of unit.

(ii) QUIZZES

Two quizzes are conducted in the course duration. One is scheduled on 29/08/2017 and the second one is scheduled on 04/11/2017.

(iii) COURSE PROJECTS

One course project is assigned to each project batch of size three in the beginning of the course and assessed at the end of the course.

One midterm evaluation is carried out to monitor the progress of the project and the team coherence.

1. Sythesys of wiper mechanisms

2. Experimental investigation of Moment Of Inertia of Gyroscope

3. Dynamometer analyses

4. Behaviour of Vibration under damping condition

10. SIMULATION SOFTWARES (If any)

1. Hydermesh

2. CAD/CATIA

3. ANSYS

4. NASTRAN


(Detailed syllabus mentioning its learning outcomes, teaching plan, tutorial questions and home assignment questions

for each unit can be given. Heads under teaching plan is given below. Model Academic plan can be taken as reference.)

UNIT I

PRECESSION:

Gyroscopes, effect of precessional motion on the stability of moving vehicles such as motor car, motor cycle, aeroplanes and ships.

STATIC AND DYNAMIC FORCE ANALYSIS OF PLANAR MECHANISMS: (NEGLECTING FRICTION)

Introduction-free body diagrams-conditions of equilibrium-two and three force members-Inertia forces and D’Alembert’s principle-planar

rotation about a fixed centre. SYNTHESIS OF LINKAGES:

Three position synthesis- four position synthesis- precision positions-structural error- Chebyshev’s spacing, Freudenstein’s Equation,

problems.

UNIT II

CLUTCHES:

Friction clutches, Single disc or plate clutch, multiple disc clutch, cone clutch& centrifugal clutch.

BRAKES AND DYNAMOMETERS:

Simple block brakes, internal expanding brake, band brake of vehicle.

Dynamometers - absorption and transmission types- general description and method of operation.

UNIT III

TURNING MOMENT DIAGRAMS AND FLYWHEELS:

TURNING MOMENT:

Inertia torque-angular velocity and acceleration of connecting rod, crank effort and torque diagrams- Fluctuation of energy-design of

flywheels.

GOVERNORS:

Watt, Porter and Proell governors, Spring loaded governors- Hartnell and Hartung with auxiliary springs, Sensitiveness, isochronism and

hunting.

UNIT IV

BALANCING:

Balancing of rotating masses – single and multiple-single and different planes-balancing of reciprocating masses-primary and secondary

balancing- analytical and graphical methods.

UNBALANCED FORCES AND COUPLES:

Balancing of V, multi cylinder inline and radial engines for primary, secondary balancing and locomotive balancing.

UNIT V

VIBRATIONS:

Free vibration of mass attached to a vertical spring - simple problems on forced damped vibration.Vibration isolation and transmissibility -

Whirling of shafts, critical speeds, torsional vibrations, two and three rotor systems.

LEARNING OUTCOMES

After completion of this unit the student will be able to

1. Analyse the Behavior of links.

2. Understand the concept of Gyroscopic effect

3. Application of Brakes, Dynamometer and Clutches and conceptual design.

4. Vibration behavior of automobile and industrial machinery

5. Balancing of Automobiles and concet.

TEACHING PLAN

S. No.

Contents of syllabus to be taught

No. of

Lecture Periods

Proposed

Delivery Methodologies


References (Text

Books / Journals / Publications/ Open

Learning Resources)

Course Outcomes

1

Introduction-Gyroscopes,

effect of precessional motion

on the stability of moving

vehicles

1st & 2nd hour PPT + Video T1,T2 To Define processional

motion and gyroscopic

effect on vehicles

2



vehicles -motor car

3rd & 4th hour Black board + Video T1,T2 To understand the

stability of moving

vehicle

3



vehicles -motor cycle

5th hour Black board T1,T2 and R2

To understand

processional effect of

motion on the stability

of aeroplanes

4



vehicles – aeroplanes

6th hour Black board + Video T1,T2 Understand the effect of

processional motion on

the stability of - ships

5



vehicles - ships.

7th hour Black board T1,T2 To understand the

Introduction-free body

diagrams

6 Introduction-free body

diagrams 8th hour Black board + PPT T1,T2

To understand

conditions of

equilibrium-two and

three force members

7

conditions of equilibrium-

two and three force

members

9th & 10th hour Black board + Video T1,T2 Inertia forces and

8 Inertia forces and

D’Alembert’s principle 11th hour Black board T1,T2 D’Alembert’s principle,

9 planar rotation about a fixed

centre 12th hours Black board + Video T1,T2 &R3 Palanar mecganism

10 Three position synthesis-

four position synthesis

13th & 14th

hour Black board T1,T2

Three and - four

position synthesis, -

structural error

11

precision positions-structural

error Chebyshev’s spacing,

Freudenstein’s Equation,

problems.

15th ,16th&17th

Black board

T1,T2 &R1 Chebyshev’s spacing, .

hour T1,T2 Freudenstein’s Equation,

problems

12 Introduction -Friction

clutches 18th hour PPT + Video T1,T2

To understand what is

friction and their uses

13 Single disc or plate clutch,

multiple disc clutch 19th hours Black board T1,T2 &R2

14 cone clutch& centrifugal

clutch 20th hour Black board + Video T1,T2

To understand what is

clutch and types

15 Simple block brakes, internal

expanding brake 21th hours Black board T1,T2

To understand about

centrifugal clutch

16 band brake of vehicle 22th & 23th

hours Black board T1,T2

To understand about

Simple block brakes,

internal expanding brake

17 Dynamometers – absorption

types 24rd&25th hour Black board + PPT T1,T2 &R3

To understand about

band brake of vehicle

18 transmission types 226th & 27th


To understand of

Dynamometers –

absorption types,

19 general description and

method of operation.

28th ,29th & 30th

hour Black board + Video T1,T2& R2

transmission types

general description and

method of operation.

20 Inertia torque-angular

velocity

31st & 32nd

hour Black board + Video T1,T2 To understand Inertia

torque-angular velocity,

acceleration of

connecting rod 21 acceleration of connecting

rod

33rd & 34th

hour Black board + Video T1,T2

22 crank effort and torque

diagrams

35th & 36th

hour Black board + Video T1,T2 &R2

23 Fluctuation of energy-design

of flywheels

37th & 38th

hour Black board + Video T1,T2

To understand crank

effort and torque

diagrams

24 Watt, Porter and Proell

governors

39th & 40th


To understand

Fluctuation of energy-

design of flywheels

25 Spring loaded governors 41st & 42nd


To understand about

Watt, Porter and Proell

governors, Spring

loaded governors,

26 Hartnell and Hartung with

auxiliary springs

43rd & 44th

hour PPT + Video T1,T2

Hartnell and Hartung

with auxiliary springs

27 Sensitiveness, isochronism

and hunting

45th & 46th


Understand

Sensitiveness,

isochronisms and

hunting

28 Balancing of rotating masses 47th hour Video T1,T2 To understand Balancing

of rotating masses single

and multiple-single and

different planes 29

single and multiple-single and

different planes

48th & 49th

hours Black board + Video T1,T2

30 balancing of reciprocating

masses

50th & 51st


To understand about

single and multiple-single

and different planes

31

primary and secondary

balancing- analytical and

graphical methods.

52nd & 53rd

hours Black board T1,T2 &R2

To understand balancing

of reciprocating masses

primary and secondary

balancing- analytical and

graphical methods

32 Balancing of V, multi cylinder

inline 54th hour PPT + Video T1,T2

Understand Balancing of

V, multi cylinder inline

33

Balancing of radial engines

for primary, secondary

balancing and locomotive

balancing.

55th & 56th


To understand Balancing

of radial engines for

primary, secondary

balancing and

locomotive balancing.

34 Free vibration of mass

attached to a vertical spring

57th & 58th

hours Black board + Video T1,T2 &R3

To understand Free

vibration of mass

attached to a vertical

spring

35 simple problems on forced

damped vibration

59th & 60th


36 Vibration isolation and

transmissibility

61st & 62nd

hours Video T1,T2

37 Whirling of shafts 63rd & 64th

hours Video T1,T2 &R3

To understand simple

problems on forced

damped vibration

38 critical speeds 65th & 66th


To understand Vibration

isolation and

transmissibility

39 torsional vibrations 67th&68Th


What is Whirling of

shafts, critical speeds

40 two and three rotor systems 69th &70th

hours Black board T1,T2 &R3

To learn torsion

vibrations, two and

three rotor systems

TUTORIAL QUESTIONS

Assignment – 1

(1)A disc with radius of gyration 60 mm and a mass of 4 Kg is mounted centrally on a horizontal axle of length 800 mm between bearings.

It spins about the axle at 800 rpm counter clockwise when viewed from the right hand side bearing. The axle precesses about a vertical

axis at 50 rpm in the clockwise direction when viewed from above. Determine the resultant reaction at each bearing due to the mass and

gyroscopic effect.

(2)An aircraft is flying at 300 Km/ hr .It turns towards left completing 1 /4 th of a circle of 80 m radius .The mass of the engine and the

other parts is 520 Kg with radius of gyration of 345 mm. The engine is running at 2400 rpm clockwise when seen from rear. Calculate the

gyroscopic couple and its effect.

(1)An effort of 1500N is required to just move a certain body up an inclined plane of 150,force acting parallel to the plane.If the angle is

increased to 180 ,the effort required is 2000N.Determine the weight of the body and the coefficient of friction.

(2)The mean diameter of the screw jack having a pitch of 10 mm is 50 mm.A load of 20kN is lifted through a distance of 170 mm.Find the

workdone in lifting the load and the efficiency of the screw jack when

(a)The load rotates with the screw

(b)The load rests on the loose head which does not rotate with the screw The external diameter and internal diameter of the bearing

surface of loose head area 50 mm and 10 mm respectivesly.Assume the coefficient of friction of the screw and the bearing surface as 0.1

(3)The mean diameter of whitworth bolt having V-threads is 20 mm.The pitch is 5 mm and the included angle of the V-thread is550 .The

bolt is tightened by s nut whose mean diameter is 37.5 mm.The coefficient of friction for the nut and bolt is 0.1 and for the nut and

bearing surface is 0.2.Determine the force required at the end of a spanner of 0.4 m long when the losd on the bolt is 60 kN.

(1) An engine shaft runs at a mean speed of 5 rps . The torque required by the engine varies uniformly from 500 Nm to 2500Nm while

the shaft runs through 900, remains constant for the next 1800, decreases uniformly to 500 Nm in 900 and remains constant for the next

one revolution. The whole cycle is repeated thereafter. The power is supplied by a constant torque motor and the fluctuations of speed is

limited to +/_ 3% of the mean speed. Determine (a) power of the motor (b) M.I of the flywheel

(2) A single cylinder single acting four stroke gas engine develops 20kW at 300 rpm. The work done by the gases during the expansion

stroke is three times the wok done on the gases during the compression stroke, the work done during the suction and exhaust strokes is

negligible .If the total fluctuation of speed is not to exceed +/_ 2% of the mean speed and the turning moment diagram is assumed to be

triangular in shape ,find the moment of inertia of the flywheel.

(1)Four masses A,B,C,D are completely balanced. Masses C and D make angles of 900 and 2100 respectively with mass B in the same

sense. The planes containing B and C are 300 mm apart. Masses A,B,C,D are supposed to be concentrated at radii of 360,480,240,300 mm

respectively. The masses B,C and D are 15 Kg,25Kg and 20 Kg respectively .

Determine (1) mass A and its angular position

(2)the planes on which the mass A and D are placed

(2)A single cylinder reciprocating engine has the reciprocating mass 50Kg and stroke 300 mm, crank speed 120 rpm, mass of reciprocating

parts30Kg at a radius of 150 mm. If 2/3 of the reciprocating parts and total rotating parts are to be balanced, determine

(i) The balancing mass required at a radius of 310 mm

(ii) Unbalanced force when the crank has turned 400 from the top dead center.

(1)Calculate the equivalent spring stiffness and the natural frequency of the following vibrating systems for a mass of 12 kg.

(i)The mass m is suspended by a spring of stiffness 5 N / mm

(ii) The mass m is suspended at the bottom of two springs of stiffness 5N/mm and 8N/mm respectively.

(iii)The mass is fixed to the midpoint of a spring of stiffness 8N/mm.

(2)A vibrating system is defined by the following parameters m=5Kg, K=100N/m, C = 5N/m/s

Determine: (a) critical damping coefficient

(b) Damping factor

(c) Natural frequency of the damped vibrations

(d) Logarithmic decrement

(e) Ratio of two successive amplitudes

(f) The number of cycles required at which the original amplitude is reduced to 40%.

(3)A gun barrel of mass 500Kg has a recoil spring of stiffness 300000N/m.If the barrel

Recoils 1.5 m on firing, determine:

(a) Initial velocity of the barrel

(b) critical damping coefficient of the dashpot which is engaged at the end of recoil

(c) The time required for the barrel to return to a position 60mm from the initial position

Model MID Paper

5ME08 R15


(AUTONOMOUS)

IIIrd Year B.Tech Ist semester MID-I Examination September 2017

Dynamics of Machinery Branch Mechanical Engineering

Time: 90 Mins DoE: Max. Marks: 20 M

PART-A

Answer the the Questions 4X1=4M

1. a) Define the different terms used in the naval ship and explain each of them.(CO1)

b) Write short notes on Flywheel and give application.(CO1)

c) Explain D-Alembert’s principles.(CO3)

d) What is a Dynamometer and list different type of dynamometers (CO3)

Answer the the Questions 3X2=6M

2. a) Explain free body diagram.(CO3)

b) What is the difference between brakes and dynamometers give examples of each of them.(CO2)

c) Draw and Explain working principle of Centrifugal clutch.(CO1)

PART-B

Answer any of three Question 3X5=15M

3 Derive the expression for Breaking torque for single shoe brake When the line of action of tangential braking force (Ft ) passes

through the fulcrum of the lever when the brake wheel rotates clockwise.(CO1)

4 The Diameter of the flywheel 1.2 m; diameter of the rope 12.5 mm; speed of the engine 200 r.p.m.; dead load on the brake 600 N;

spring balance reading 150 N. Calculate the brake power of the engine.(CO2)

5 A uniform disc having a mass of 8Kg and radius of gyration of 150mm is mounted on one end of a horizontal arm of 200 mm

length. The other end of arm can rotate freely in an universal bearing. The disc is given a clockwise spin of 250 rpm as seen from the disc

end of the arm. Determine the precision motion of the disc if arm remains horizontal.(CO3)

6 The turbine rotor of ship has a mass of 2.2 tonnes and rotates at 1800 rpm clockwise when viewed from the stern. The radius of the

rotor is 320 mm. determine the gyroscopic couple when ship turns right at a radius of 250mm with a speed of 25km/h.(CO3)





SUBJECT: POWER ELECTRONICS

(EEE)


------------------------------------------------------------------------------------------------------------------------------------------------------------------

Subject Code

5ME08

R15

PART-A


xi. Identify the direction of motion due to gyroscopic effect CO2

xii. Define static force analysis and dynamic force analysis CO3

xiii. Define uniform wear and uniform pressure, CO2

xiv. 6) define boundary friction and film lubrication CO3

xv. State the effect of inertia of shafts in vibrations CO3

xvi. Determine the dimensions of flywheel for safe design Compare the functions of governor CO1

xvii. Explin And flywheel

Viii Define logarithmic decrement in damped vibrations

ix Define magnification factor, vibration isolation and transmissibility

x.Solve for the frequency of longitudinal , transverse and torsional vibrations

i. CO2

Part-B


UNIT I

1. (3)The turbine rotor of a ship has a mass of 2.2 tonnes and rotates at 1800 rpm clockwise when viewed from the aft. The radius of

gyration of the rotor is 320 mm. Determine the gyroscopic couple and its effect when

(a) Ship turns right at a radius of 250 mm with a speed of 25 Km/hr

(b)The ship pitches with the bow rising at an angular velocity of 0.8 rad/sec

(c)Ship rolls at an angular velocity of 0.1 rad/sec

(CO2)

2. A four wheeled motor car of mass 2 tonnes has a height of C.G 600 mm above the ground level. The engine parts and transmission are

equivalent to a flywheel of 80 Kg with a radius of gyration of 150 mm and their coincides with the longitudinal axis of the vehicle .The car

negotiates a curve of 60 m radius at 72 Km/hr with the overall gear ratio of 4.The radius of the road wheel is 300 mm and its moment of

inertia is 3 Kgm2.Assume wheel track as 1.5 m. Determine the reaction at each road wheel (CO1)

UNIT II

3.The thrust of a propeller shaft in a marine engine is taken up by a number of collars integral with the shaft which is 300 mm in

diameter.The thrust on the shaft is 20 x 104N and speed is 90 rpm.Assume the intensity of pressure is uniform and equal to 0.3 MPa.Find

the external diameter of the collar and the number of collars required if the power lost in friction is 20kW.Take μ (CO3)

(5A single plate clutch effective of both sides is required to transmit 25 kW at 3000 rpm.Determine the outer and inner radii of the

friction surface if μ is 0.255,the ratio of radii is 1.25 and the maximum pressure is not to exceed 0.1 N/ mm2.Also determine the axial

thrust to be provided by the springs .Assume uniform wear theory. (CO2)

UNIT III

5. The torque of a three crank engine is given by (6000+ 1200 sin3θ)Nm. The M.I of the flywheel is 900 kgm2 and the mean speed of the

engine is 300 rpm.determine

(a) The power of the engine

(b)the total fluctuation of speed when(i) the resisting torque is constant . (ii)the resisting torque is( 6000+ 720 sinθ)Nm (CO2)

7.A machine punches 50 mm diameter holes in a 40 mm thick plate and does 60Nm of work per square cm of sheared area. The punch

has a stroke of 120 mm and punches one hole in every 12 seconds. The maximum and minimum speeds of the flywheel are 30m/sec and

24m/sec respectively during each punching operation.

Determine (a)power of the motor (b) mass of the flywheel (CO1)

UNIT IV

7.A twin inside cylinder locomotive has its cylinders at 750 mm apart and the cranks are at right angles. The rotating parts are 300 Kg at a

crank radius of 300mm and reciprocating masses are 450 Kg .All the revolving parts and 2/3 of the reciprocating parts are to be balanced.

The driving wheels are 1.8 m in diameter and the distance between the wheel Centre’s is 1,55m. When the engine runs at 60Km per

hour, determine

(i) Magnitude and direction of balancing masses placed at a radius of 0.6 m

(ii) Variation in tractive force

(iii) Swaying couple

(iv) Hammer blow (CO2)

8.An engine having 5 cylinders in line has successive cranks 1440apart.The distance between the cylinder centre lines is 400 mm. The

reciprocating mass for each cylinder is 16 Kg and the crank radius is 100 mm and connecting rod length is 440mm.The engine runs at 600

rpm. Examine engine for balance of primary and secondary forces and couples. Determine the maximum values of these and position of

the central crank at which these occur. (CO3)

UNIT V

9. A shaft 300 mm diameter, 1.5 m long is simply supported at its ends. It is subjected to point loads of 1kN,1.5 kN and 2kN at distance of

400,600,800 mm from left hand support respectively. Assuming the mass of the shaft as 550Kg/m length, determine the natural frequency

of transverse vibrations .Assume E = 2 x 105 MN/m2. . (CO3)

10.A rotor of mass 15 Kg is mounted midway on a shaft of 30mm diameter supported by two bearings at its ends .The span between the

bearings is 1200 mm. Due to some manufacturing defect,the C.G of the rotor is 0.05 mm away from the geometric Centre of the rotor. If

the shaft rotates at 2500rpm, determine the amplitude of the steady state vibrations and the dynamic force on the bearings .Take E = 200

GN/m2. (CO3)

.









(III) B. Tech :(I) Sem : (MECHANICAL)-(B) L T/P/D C

Course Name: MED I

Course Code: 5ME09

Names of the Faculty Member : MR.T.MALYADRI

Number of working days : 90

Number of Hours/week : 5

Total number of periods planned : 80

1. PREREQUISITES

(This information helps the student to refer to the required topics before undergoing the course. This builds confidence

in a student.)

Maths, Physics, Engineering Mechanics Strength of materials , Metallurgy and material science , kinematics of Machinery .




• Understand different properties of Materials and relationship between them.


• Understand the principles of stress, strain and Principal stresses as applied to Solid bodies or structural and machine elements

under loads.

• Understand to form mathematical equation and analyze problems by making appropriate assumptions and learn systematic

engineering method to solve practical Design engineering problems.

3. COURSE OUTCOMES (COs) (Outcomes define what the student will be able to do upon completion of the course. Course outcomes must be


• Model and analyze design problems in Mechanical and structural engineering.

• Apply knowledge of standard elements and their technical information available in the data bases and in designing machine

elements.

• Predict modes of failure in materials or machine elements caused by different types of loads under operation.

• Apply knowledge of design procedures to design the shafts, keys and springs.


Course

Outcomes

(COs)



CO 1 1 2 3

2

1

CO 2 1 3 2

1

2

CO 3 3 2 1

2

1


5. LEARNING RESOURCES:

(i) TEXT BOOKS

• 1. Design of Machine Elements by Bhandari; Publisher: Tata McGraw Hill.

• 2. Mechanical Engineering Design by Shigley J. E and Mischke C. R; Publisher: TataMcGraw Hill.


(Course delivery including latest trends brings good insight of the course in students and also inculcates the habit

of self learning among the students.


(a) Publications

• 1. Engineering Design by George E Dieter; Publisher: McGraw Hill.

• 2. Machine Design - An Integrated Approach by Robert L.Norton; Publisher: Addison

• Wesley.

• 3. Fundamentals of Machine Component Design by Juvinall R. C and Marshek K. M;

• Publisher: John Wiley and Sons.


• Google, YouTube, Wikipedia

(iii) JOURNALS

J1. International Journal of Design Engineering

J2. Journal of Mechanical Design

J3. International Journal of Machine Design and Manufacturing



adopted to involve the student in learning)

DM1: Chalk and Talk

DM8: PPT



Nill

8. ASSESSMENT




AM1: Semester End Examination AM2: Mid Term Examination

AM3: Home Assignments AM4: Open Book Test

AM5: Objective Test AM6: Quizzes

** COURSE PROJECTS

(To be added for the courses as directed by the department. The no. of course projects is left to the liberty of

faculty.

One course project is assigned to each project batch of size three in the beginning of the course and assessed at

the end of the course. One midterm evaluation is carried out to monitor the progress of the project and the team

coherence.)


(The allotted marks for home assignments, quizzes, course projects and etc., are left to the liberty of faculty. But for the

finalisation of assignment marks, the following weightages can be considered.)

For R15

S. No. Assessment Methodology


the courses with Course

project


the courses without

Course project

1.

Assignment

3%

10

5% 10

2. 3% 5%

3. Course project 4% -

4. Internal Examination 30 30

5. External Examination 60 60

10.SIMULATION SOFTWARES (If any)

Nill




UNIT-I

ENGINEERING MATERIALS AND DESIGN CONSIDERATIONS

The Design Phase / Methodology, and identification of need, Evaluation and Presentation, Reliability and Product liability. Mechanical

Properties of Engineering Materials, overall design considerations, Factor safety, Preferred Numbers. Standard and codes, design data

handbook. Load, stress and critical sections in machine parts. Static strength, plastic deformation, temperature properties, Definition of

stress, simple stress, combined stress, complex stress. Members subjected to axial, bending, torsion and shear loading, impact stresses.

LEARNING OUTCOMES: after successful completion of unit – I the student must be able to

• Discuss the important phases of design

• Explain the importance of standardization

http://books.google.co.in/books?id=d-eNe-VRc1oC&pg=PA22&source=gbs_toc_r&cad=4

• Define factor of safety and explain its importance.

• Enumerate manufacturing considerations in design.

• Discuss the terms codes and standards, Reliability.

• Enumerate various types of stresses and develop the relation between them

• Discuss the concept of stiffness in tension, bending, torsion and combined loading situations.

Lecture Plan

S.


No. of

Lecture

Periods

Lecture

Dates

Proposed Delivery

Methodologies


References

(Text Books /

Journals /

Publications/ Open

Learning Resources)

Course

Outcomes

1) Introduction to Machine Design 1 3/7/17 DM1. Chalk and Talk

L.1.

T.1, T.2& T.3 CO 1

2) WIT & WILL 1 4/7/17 DM1. Chalk and Talk L.1. CO 1

(along with PPT)

T.1, T.2& T.3

3) Basic concepts of Design needs and

Identifiacation 1 4/7/17

DM1. Chalk and Talk

(along with PPT)

L.1.

T.1, T.2& T.3

CO 1

4) Design Procedure and material

Properties 1 6/7/17

DM1. Chalk and Talk

L.1.

T.1, T.2& T.3

CO 1

5) FOS and Problems 1 8/7/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 1

6)

MOS derivations and Design data

Book

1 10/7/17

DM1. Chalk and Talk

L.1.

T.1, T.2& T.3

CO 1

7) Problems on SOM 1 11/7/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 1

8) Reliability Standerd code and

Preffered Numbers 1 12/7/17

DM1. Chalk and Talk

(along with PPT)

L.1.

T.1, T.2& T.3

CO 1

9) Problems on Principal stresses 1 13/7/17

DM1. Chalk and Talk

L.1.

T.1, T.2& T.3

CO 1

10) Problems on Combined loading

axial,Bending ,Torsion 1 15/7/17

DM1. Chalk and Talk

L.1.

T.1, T.2& T.3

CO 1

11) Impact ,Theories Of Failures 1 18/7/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 1

12) Fatigue concept 1 19/7/17

DM1. Chalk and Talk

(along with PPT)

L.1.

T.1, T.2& T.3

CO 1

13) Stress concentration Factor and

Reduction 1 20/7/17

DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 1

14) Fluctuating loads and types 1 24/7/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 1

15) Endurance limit and Fatigue Test 1 25/7/17


T.1, T.2& T.3

CO 1

16) S-N Diagram for different structural

materials 2 26/7/17


T.1, T.2& T.3

CO 1

17) Low cycle and High cycle fatigue 1 27/7/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 1

18) Notch sensitivity and Factors 1 31/7/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 1

19) Finite and infinite life 1 1/8/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 1

20) Gerber Theory and Problems 2 2/8/17 DM1. Chalk and Talk L.1. CO 4

T.1, T.2& T.3

21) Soderburg theory and Problems 1 3/8/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 4

22) Good Man Line for Fatigue 1 7/8/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 1

23) Problems Good man 1 8/8/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 4

24) Problems on all conditions 2 9/8/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3 CO 4

25) Types of fasteners 1 10/8/17

DM1. Chalk and Talk

(along with PPT)

L.1.

T.1, T.2& T.3

CO 2

26) Introduction to Bolted Joints 2 16/8/17

DM1. Chalk and Talk

(along with PPT)

L.1.

T.1, T.2& T.3

CO 2

27) Bolts under axial loads 1 17/8/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 2

28)

Bolted joint under Initial condition

1 21/8/17


T.1, T.2& T.3

CO 2

29) Uniform strength of Bolts 1 22/8/17 DM1. Chalk and Talk L.1.

CO 2

30) Bolted joints under Eccentric loading 1 23/8/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 2

31) Inplane Loading derivation 1 23/8/17 DM1. Chalk and Talk L.1. CO 2

T.1, T.2& T.3

32) Eccentric load on circular base bolts 1 24/8/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 2

33) Eccentric circular bolts 1 29/8/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3 CO 3

34) Problems on Bolted joints 2 30/8/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 3

35) Problems on bolted joints 1 31/8/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 3

36) Introduction to Riveted Joints 1 12/9/17

DM1. Chalk and Talk

(along with PPT)

L.1.

T.1, T.2& T.3

CO 4

37) Types of rivets and design and

failure of riveted joints 2 14/9/17


T.1, T.2& T.3

CO 4

38)

Design of Lap joint ,Zig-Zag triple

Riveted problem

1 18/9/17


T.1, T.2& T.3

CO 4

39) Boiler Joints

1 19/9/17


T.1, T.2& T.3

CO 4

40) Diamond and Lozenge joints 2 21/9/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 4

41) Problems on riveted joints 1 26/9/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 4

42) Problems on riveted joints 2 27/9/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 4

43) Eccentric loading on Rivets 1 3/10/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 1

44) Introduction to welded joints 2 4/10/17

DM1. Chalk and Talk

(along with PPT)

L.1.

T.1, T.2& T.3

CO 4

45) Welding symbols Strength of parallel

and fillet joints 1 5/10/17


T.1, T.2& T.3 CO 4

46) Special case of fillet welded joints 1 9/10/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 2

47) Eccentric load of fillet welding joints 1 10/10/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 2

48)

Introduction to Belt Drives

(Open&cross)

2 11/10/17

DM1. Chalk and Talk

(along with PPT)

L.1.

T.1, T.2& T.3

CO 2

49) Derivation of Tension Ratios,

Centrifugal Tension 1 12/10/17

DM1. Chalk and Talk

L.1.

T.1, T.2& T.3

CO 2

50) V-Belt Drives Derivation 1 16/10/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 1

51) Introduction to springs , Classification

of spring material, 1 17/10/17

DM1. Chalk and Talk

(along with PPT)

L.1.

T.1, T.2& T.3

CO 4

52) Design of helical, leaf, disc and tensional

springs under constant load. 2 18/10/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3 CO 4

53) Problems on springs 2 23/10/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 2

54) Introduction to key and classification of

keys, 1 24/10/17

DM1. Chalk and Talk

(along with PPT)

L.1.

T.1, T.2& T.3

CO 2

55)

Stresses in the keys, Design

considerations,

2 25/10/17


T.1, T.2& T.3

CO 2

56) Effect of key way on the shaft strength 1 26/10/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 2

57) Introduction to Transmission shafts, 1 30/10/17

DM1. Chalk and Talk

(along with PPT)

L.1.

T.1, T.2& T.3

CO 1

58) Design of solid and hollow shafts based

on strength and rigidity 1 31/10/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 4

59) Flexible shafts, shaft and axles. 2 1/11/17 DM1. Chalk and Talk L.1.

T.1, T.2& T.3

CO 4

Assignment 1:

1. Discuss general considerations in the design of Engineering material

2. State and explain various properties of Engineering materials

3. Explain various factors which govern the selection of engineering materials

4. Enumerate manufacturing considerations in design.

5. Explain the terms Tolerances and fits and its importance in manufacturing of materials.

6. Discuss BIS codes of steels

7. Enumerate various types of stresses and develop the relation between stress and strain.

8. State and explain various theories of failures and their application in design of engineering materials.

9. Define factor of safety and explain its importance.

10. Discuss the term Design for strength and rigidity.

11. Explain the term preferred numbers.

12. Discuss the concept of stiffness in tension, bending, torsion and combined loading situations.

13. Explain concept static strength design based on fracture toughness.

14. A machine member 0.05m diameter and 0.25 m long is supported at one end as a cantilever. The transverse load at the free end is

2750 N causes bending, axial load is 13.75 KN and twisting moment at the free end is 250Nm. Determine principle stresses and

maximum shear stresses for the following cases.

(a)Bending and torsion loads

(b)Bending and axial loads

(c)Torsion and axial loads\

(d)Bending, axial and torsional loads

15. A bolt is subjected to an axial force of 10 KN with a transverse shear force of 5 KN. The permissible tensile stress at elastic limit

is 100 MPa and the poissions ratio is 0.3 for the bolt material. Determine the diameter of the bolt required according to each

theory of failure.

16. A shaft is designed based on maximum distortion energy theory with a factor of safety of 2.0. The material used is 30C8 steel with

a yield stress of 310 MPa. It is subjected to an axial load of 40 KN. Determine the maximum torque capacity. Diameter of shaft is

20 mm.

17. A 50 mm diameter steel shaft is supported on bearings 1.5m apart and carries a fly wheel weighing ‘W’. The allowable bending

stress for the shaft material and the maximum deflection are limited to 100 MPa and 2 mm respectively. The young’s modulus for

the shaft material is 210 GPa. Determine the Maximum permissible weight of the flywheel.

18. The diameter of a piston of the steam engine is 250 mm and the maximum steam pressure is 0.8 N/mm2, find the size of the

piston rod.

19. A flange coupling is held together by four M24 bolts, and arranged on bolt circle of 150 mm. Each bolt is initially tightened to a

load of 50 KN to make a tight joint. The power transmitted by the coupling is 5Kw at a speed of 600 RPM. Estimate the Maximum

Normal and Shear Stresses in the Bolt Material.

20. A hollow shaft is required to transmit 600 KW at 110 rpm the maximum torque being 20% greater than the mean. The shear

stress is not to exceed 63 MPa and twist in a length of 3 meters not to exceed 1.4 degrees. Find the external diameter of the shaft,

if the internal diameter to the external diameter is 3/8. Take G = 84 GPa. UNIT – II

DESIGN AGAINST FLUCTUATING LOAD

http://books.google.co.in/books?id=d-eNe-VRc1oC&pg=PA156&source=gbs_toc_r&cad=4

Stress concentration, stress concentration factors, Reduction stress concentration, fluctuating stresses. Fatigue strength,

Endurance Limit, fatigue test, S-N diagrams for different structural materials. Low cycle and high cycle fatigue, Notch sensitivity, Design for

finite and infinite life. Soderberg and Goodman lines the fatigue strength, modified Goodman theory.

LEARNING OUTCOMES: after successful completion of unit – II the student must be able to

1. Explain the terms stress concentration, theoretical stress concentration factor, fatigue stress concentration factor, notch sensitivity

and develop the relation between them.

2. Explain the S-N diagrams for different structural materials

3. Discuss the finite and infinite life.

4. Explain the Soderberg and Goodman lines the fatigue strength

5. Discuss the concept involved in Goodman’s line, Soderberg’s line and Modified Goodman’s line.

Assignment 2:

1. A 40 mm diameter shaft is made of steel 50C4 (Sut = 660 N/mm2) and has a machined surface. The expected reliability is

99%. The theoretical stress concentration factor for the shape of the shaft is 1.6 and the notch sensitivity factor is 0.9.

Determine the endurance strength of the shaft.

2.A shaft supported as a simple beam, 0.45 mm long, is made of AISI 3120 steel. With the shaft rotating a steady load of 8000 N

is applied midway between the bearings. The surfaces are ground. Indefinite life is desired with a factor of safety of 1.6 based on

endurance strength. What should be the minimum diameter of the shaft if there are no surface discontinuities? Endurance limit

is 630 MPa. Size factor is 0.85 and machine surface finish factor 0.87.

(3) A leaf spring in an automobile is subjected to cyclical stresses.

The average stress = 150 MPa, variable stress = 50 MPa, Ultimate stress = 630 MPa, Yield point stress = 350 MPa and

2 2

(6) A bar of circular cross-section is subjected to alternating tensile forces varying from a minimum of 200 kN to a maximum of

500kN. It is to be manufactured of a material with an ultimate tensile strength of 900 MPa and an endurance limit of 700 MPa.

Determine the diameter of bar using safety factors of 3.5 related to ultimate tensile strength and 4 related to endurance limit and a

stress concentration factor of 1.65 for fatigue load. Use Goodman straight line as basis for design.

(7) A steel connecting rod is subjected to a completely reversed axial load of 120 KN. Suggest the suitable size of the rod using a

factor of safety 1.8. The ultimate strength of the material is 1000 MPa.

Load correction factor 0.7

Size factor0.85

Surface finish factor 0.8

(8) A pulley is keyed to a shaft midway between two anti-friction bearings. The bending moment of the pulley varies from 150 Nm

to 450 Nm as torsional moment of the shaft varies from 50 Nm to 150 Nm. The frequency of variation of the loads is the same as

the shaft speed. The shaft is made of cold drawn steel having an ultimate strength of 550 MPa and yield strength of 310 MPa.

Determine the required diameter for an indefinite life. The stress concentration factor for the key way in bending and torsion may

be taken as 1.6 and 1.3 respectively. Use a design factor of 1.8, size factor 0.85 and surface correction factor 0.88.

endurance limit = 150 MPa. Estimate under what factor of safety the spring is working, by Goodman and Soderberg formulae.

(4) A stepped shaft transmits a torque varying from 800 Nm to 1200 Nm. The ratio of diameter is 1.5and the stress

concentration factor is 1.2. Determine the diameter of the shaft for an infinite life for a design factor of safety 1.8. The Ultimate

tensile strength of the material of the shaft is 600 MPa. Yield stress of the material is 450 MPa. Consider the size effect and

surgace finish effect.

(5)A round shaft made of cold finished AISI 1020 steel is subjected to a variable torque whose maximum value is 700 KN-m.

For a factor of safety of 1.5 on the Soderberg criterion, determine the diameter of the shaft if

a.The torque is reversed

b.The torque varies from zero to maximum

c.The torque varies from 300 Nm to a maximum

Use for torsion,

Size correction factor = 0.6 and

The nominal design torsion stress = 0.6 Yield point in tension.

(9) A shaft is made of steel ultimate tensile strength 700 MPa and yield point 420 MPa is subjected to a torque varying from 200N m

anti-clockwise to 600 Nm clockwise. Calculate the diameter of the shaft if the factor of safetyis 2 and it is based on the yield point

and the endurance strength in shear.

(10) A hot rolled shaft is subjected to torsional load that varies from 320 Nm clockwise to 120 Nm anti-clockwise and an applied

bending moment at a critical section varies from 400 Nm to 200 Nm. The shaft is of uniform cross section. Determine the required

shaft diameter. The material has an ultimate strength of 560 MPa and yield strength of 420 MPa. Assume factor of safety to be 2.

(11) Bending stress in a machine part fluctuate between a tensile stress of 280 MPa and compressive stress of 140 MPa. What should

be the minimum ultimate tensile strength to carry this fluctuation indefinitely according to

(i)Goodman’s formula

(ii)Soderberg’s formula

The factor of safety may be assumed to be 1.75. Assume that yield point is never likely to be less than 55% of the ultimate tensile

strength or greater than 93 % of it.

UNIT- III

DESIGN OF FASTERNERS

Temporary Fasteners (Bolted and Screwed Fasteners)

Bolted joints, bolted joint under initial loading, eccentrically loaded Bolted Joints under different static load conditions.

Permanent Fasteners (Riveted and Welded Fasteners)

Riveted Joints, eccentrically loaded Riveted Joints, Design of Boiler Riveted joints, and Welding symbols, butt and fillet welds, stress in the

welded joints carries tension bending and shear loading, Design of various types of Welding joints and eccentrically loaded welded joints

under different static load conditions.

LEARNING OUTCOMES: after successful completion of unit – III the student must be able to

1. Explain the Temporary Fasteners, Permanent Fasteners.

2. Discuss different types of bolted joints.

3. Explain importance of bolted joints.

4. Describe procedures for design of bolts with pre-stresses.

5. Discuss design of bolted and riveted joints under eccentric loading.

6. Explain importance of welding.

7. Explain Torsion in welded joints.

8. Calculate strength of welded joints.

9. Explain the eccentrically loaded welded joints under different static load conditions.

Assignment 3:

(1)A double riveted butt joint, in which the pitch of the rivets in the outer rows is twice that in the inner rows, connects two 16 mm

thick plates with two cover plates each 12 mm thick. The diameter of the rivets is 22 mm. Determine the pitches of the rivets in the two

rows if the working stresses are not to exceed the following limits:

Tensile stress in plates = 100 MPa, Shear stress in rivets = 75 MPa and bearing stresses in rivets and plates = 150 MPa.

Make a fully dimensioned sketch of the joint showing atleast two views.

[Question from Set No. 1, Nov. 2005/Regular Examiniations]

(2)Two lengths of mild steel tie rod having width 200 mm are to be connected by means of Lozenge joint with two cover plates to

withstand a tensile load of 180 KN. Completely design the joint, if the permissible stresses are 80 MPa in tension, 65 MPa in shear and 160

MPa in crushing. Draw a neat sketch of the joint.

[Question fromSet No. 2, Nov. 2005/Regular Examiniations]

(3)A triple riveted lap joint with zig-zag riveting is to be designed to connect two plates of 6 mm thickness. Determine the diameter of the

rivet, pitch of rivets and distance between the rows of the rivets. Indicate how the joint will fail. Also, find the efficiency of the joint. The

permissible stresses are 120 MPa in tension, 100 MPa in shear and 150 MPa in crushing.

[Question fromSet No. 3, Nov. 2005/Regular Examiniations]

(4)A double riveted double cover butt joint in plates 20-mm thick is made with 25 mm diameter rivets at 100 mm pitch. The permissible

stresses are 120 MPa in tension, 100 MPa in shear and 150 MPa in crushing. Find the efficiency of joint, taking the strength of the rivet in

double shear as twice than that of single shear.

[Question from Set No. 4, Nov. 2005/Regular Examiniations]

(5) A double riveted lap joint is made between 15 mm thick plates. The rivet diameter and pitch are 25 mm and 75 mm respectively. If the

ultimate stresses are 400 MPa in tension, 320 MPa in shear and 640 MPa in crushing, find the minimum force per pitch which will rupture

the joint.If the above joint is subjected to a load such that the factor of safety is two, find out the actual stresses developed in the plates

and the rivets.

[Question from Set No. 1, May 2005/Supplementary Examiniations]

(6)Two plates 16 mm thick are joined by a double riveted lap joint. The pitch of each row of rivets is 90 mm. The rivets are 25 mm in

diameter. The permissible stresses are 140 MPa in tension, 80 MPa in shear and 160 MPa in crushing. Find the efficiency of the joint.

[Question from Set No. 2, May 2005/Supplementary Examiniations] UNIT-IV

DESIGN OF FLEXIBLE MECHANICAL ELEMENTS

Belt Drives:

Introduction, classification of belts, belt materials, design of flat (rectangular) belts, ratio of belt tensions, V-Belts, power

transmitted through V-Belt, design of V-Belts.

Springs:

Classification of springs, spring material, Design of helical, leaf, disc and tensional springs under constant loads and varying loads.

LEARNING OUTCOMES: after successful completion of unit –IV the student must be able to

1. Classify the different types of blets and belt materials

2. Discuss ratio of belt tensions

3. Explain the power transmitted by flat and V-belts

4. Discuss the classification of springs and special features of each.

5. Derive the relations between stress and load & deflection and load for any type of spring.

6. Describe the design procedure when springs under fatigue loading.

7. Design the helical springs.

Assignment 4:

8. Discuss the classification of springs and special features of each.

9. Derive the relations between stress and load & deflection and load for any type of spring.

10. Describe the design procedure when springs under fatigue loading.

11. Explain the concept of natural frequency of helical springs.

12. Derive the relations for energy storage capacity for various types of springs.

13. Differentiate the advantages of co-axial springs over other springs.

14. What are the different types of Belt used?

15. State the factors to be considered while selecting belt drive?

16. What is the difference between open and cross belt drive?

17. What are the different materials used for belt drive?

18. Which material is used for flat belt and v belt and rope drive?

19. State advantages & Disadvantages of V-belt over flat belt.

20. What is effect of following action taken are on belt adjusting mechanism.

21. Overtightening of pulley 2] under-tightening of pulley

22. Different between Flat belt and V – belt.

23. Define Angle of lap

24. What is slip in belts ? Write formula for % slip & state effect of slip on power transmitted.

25. What do you mean by creep in belts ? What is its effect.?

http://www.mechdiploma.com/?q=content/q1-what-are-different-types-belt-used

http://www.mechdiploma.com/?q=content/q2-state-factors-be-considered-while-selecting-belt-drive

http://www.mechdiploma.com/?q=content/q3-what-difference-between-open-and-cross-belt-drive

http://www.mechdiploma.com/?q=content/q4-what-are-different-materials-used-belt-drive

http://www.mechdiploma.com/?q=content/q5which-material-used-flat-belt-and-v-belt-and-rope-drive

http://www.mechdiploma.com/?q=content/q6-state-advantages-disadvantages-v-belt-over-flat-belt

http://www.mechdiploma.com/?q=content/q7what-effect-following-action-taken-are-belt-adjusting-mechanism

http://www.mechdiploma.com/?q=content/1-overtightening-pulley-2-under-tightening-pulley

http://www.mechdiploma.com/?q=content/q8-different-between-flat-belt-and-v-%E2%80%93-belt

http://www.mechdiploma.com/?q=content/q9-define-angle-lap

http://www.mechdiploma.com/?q=content/q10what-slip-belts-write-formula-slip-state-effect-slip-power-transmitted

http://www.mechdiploma.com/?q=content/q11what-do-you-mean-creep-belts-what-its-effect

26. What is crowning of pulley ? Why it is done.

27. What is centrifugal tension in belts ? What is its effect on power transmitted ? Write condition for max power transmitted.

28. What do you mean by initial tension of the belt.

29. Derive expression for ratio of tension on tight side and slack side.

30. Two Parallel shafts are provided with pulleys 480mm and 640 mm diameters and central distance is 3m. Find the length of

1) Crossed belt 2) Open belt.{Lc=7.843 meters, Lo=7.761 meters}

31. Two pulleys having diameters 800mm and 600mm are 8m apart, are connected by crossed belt drive. Calculate the change

in the length if direction of rotation of the driven pulley to be reversed. {

1. Two Shafts with centre to centre distance between them as 3.5 meters, are having two pulleys with radii equal to 640 mm and 370

mm respectively. Find the length of crossed belt. {Lc=10.46 m B) Problems on slip in belts

2. Find the diameter of driven pulley rotating at 500 rpm if the driver pulley is 250mm in diameter and rotates at 100 rpm by using

flat belt drive with 5% slip and the belt thickness is 5 mm. {48.68 mm}

3. A shaft runs at 80 rpm and drives another shaft at 150 rpm through belt drive. the diameter of driving pulley is 600mm .

Determine the diameter of the driven pulley taking belt thickness 5mm and slip 4%. {0.3023 m or 302.3mm}

4. The speed of driving pulley is 600 rpm and that of driven pulley is 1800 rpm. If diameter of driving is 500 mm and that of driven is

155 mm. find % slip in belt if belt is 4 mm thick.s= 3.45 %}

5. A spring for a spring balance is required to have deflection of 60mm for a load of 1500 N. Design the spring assuming spring index

6. Take shear stress as 360 Mpa and modulus of rigidity as 84 GPa. find free length of spring.

6. Design a spring to take a load of 300 N with spring index 8 and shear stress 400 MPa...The spring should deflect by 15 mm under

this load..Take G= 84 GPa.

7. Model QP 3] Design a helical compression spring for a maximum load of 1000 N for a deflection of 25mm using the value of spring

index as 5 and Wahl’s correction factor as 1.3. The maximum permissible shear stress for the spring wire is 400 Mpa and modulus

of rigidity 84 KN/mm2.

8. W-2013-8 marks 4] The spring of spring balance, elongates by 150 mm, when subjected to a load of 400 N. the spring index is 6.

Take permissible shear stress for the wire material 540 MPa and G=84 Gpa..Determine

http://www.mechdiploma.com/?q=content/q12what-crowning-pulley-why-it-done

http://www.mechdiploma.com/?q=content/q13what-centrifugal-tension-belts-what-its-effect-power-transmitted-write-condition-max

http://www.mechdiploma.com/?q=content/q14-what-do-you-mean-initial-tension-belt

http://www.mechdiploma.com/?q=content/q15-derive-expression-ratio-tension-tight-side-and-slack-side

1) the wire diameter 2) the diameter of Coil 3) No of turns. {W-2010}

9. A helical spring is made from a wire of diameter 6mm diameter and has outside diameter of 75 mm. If the permissible shear stress

is 350 MPa and modulus of rigidity is 84 kN/mm2. find the axial load which the spring can carry and the deflection per active turn.

Take Wahl’s correction factor .

{W=383.4 N, {S-2009}

10. A closed coil helical spring is used for an automobile suspension system. The spring has stiffness 85 N/mm with square and ground

ends. The load on the spring causes a total deflection of 9 mm. Taking permissible shear stress 400 MPa spring index 6 and G=80

GPa.Find,

1) Wire diameter of spring, 2) Length of spring.

11. Design a helical compression spring for a maximum load of 1000 N for a deflection of 23mm using spring index 5. The maximum

permissible shear stress is 420 MPa and modulus of rigidity is 84 GPa.Find the pitch of spring assuming square and ground ends.

{d=6.3 mm ,D=35 mm,n=13.44 turns, Lf=138.45, p=9.23 mm}S-2012 8 marks Important

12. Design a close coiled helical compression spring for a service load ranging from 2250 to 2750. The axial deflection of the spring for

the load range is 6mm. Assume a spring index of 5. , Neglect the effect of stress

concentration . Draw fully dimensioned sketch of the spring showing the details of the finish of the end coils. Assume squared and

ground ends. { pitch =13.80mm}

13. Design a helical spring with square and ground ends for a load ranging from 80 N to 145 N when required deflection is 6.5 mm.

Take spring index as 8 ,permissible shear stress for the wire material 475 MPa and G=84 Gpa. {

pitch =6.19mm}

14. Design and draw a valve spring of a petrol engine for the following operating conditions :

Spring load when the valve is open = 400 N

Spring load when the valve is closed = 250 N

Maximum inside diameter of spring = 25 mm

Length of the spring when the valve is open = 40 mm

Length of the spring when the valve is closed = 50 mm

Maximum permissible shear stress = 400 MPa

UNIT-V DESIGN OF SHAFTS AND KEYS

32. Transmission shafts, Design of solid and hollow shafts based on strength, rigidity and Flexible shafts, shaft and axles – key

and classification of keys, stresses in the keys, design considerations, effect of key way on the shaft strength.

33.

LEARNING OUTCOMES: after successful completion of unit –V the student must be able to Explain the Transmission shafts

1 Design of solid and hollow shafts based on strength and rigidity

2 Discuss about different types of keys and their function

3 Explain the different types of stresses developed in keys

4 Enumerate the design considerations of keys

5 Explain the effect of key way on the shaft strength.

6 Explain the effect of key way on the strength of a shaft.

7 Write the comparison between solid shafts, hollow shafts and spindles.

1. A shaft is required to transfer 43KW of power at 600 rpm. The outside diameter must not exceed 50 mm and the maximum shear stress is not to exceed 70 N/mm2. Find out the dimensions of hollow and solid shaft, which would meet their requirements. Also

compare their weights.

2. Compute the diameter of a solid shaft which has to transmit 16KW power at 300 rpm. Ultimate shear stress per shaft material is 350

N/mm2 and factor of safety for design is 6. If a hollow shaft replaces the solid shaft, find the inside and outside diameters if the ratio is

0.5.

3. A shaft is supported by two bearings placed 1.2 m apart. A 600 mm diameter pulley is mounted at a distance of 300mm to the right of

left hand bearing and this drives a pulley directly below it with the help of a belt having maximum tension of 2kN. Another pulley 400

mm diameter is placed 200 mm to the left hand bearing and is driven with the help of an electric motor and belt which is placed

horizontally to the right. The angle of contact for both the pulleys is 1800and coefficient of friction is 0.24. Calculate the diameter of the

shaft taking working stresses of 63 Mpa in tension and 42 Mpa in shear.

4. A shaft running at 400 rpm transmits 10 kW. Assuming allowable shear stress in shaft is 40 Mpa, find the diameter of the shaft.

5. Determine the diameter of the hollow shaft with inside dia = 0.6 outside dia. The shaft is driven by an overhung pulley of 90 cm

diameter. Take weight of pulley is 60 kg, the belt tensions as 290 and 100 kg, over hang= 25 cm, angle of lap is 1800.


(END EXAMINATION)

Subject Code 5MED09

R15

VNR VIGNANA JYOTHI INSTITUTE OF ENGINEERING AND TECHNOLOGY (AUTONOMOUS)

B.Tech. III Year I Semester Regular Examinations, November/December, MECHANICAL ENGINEERING DESIGN-I

(ME) Time: 3Hours Max. Marks: 60M

PART-A I. Answer the following questions 10Х2=20M

1. Define machine design.

2. What is stress concentration?

3. How is rivet specified?

4. What is spring index?

5. What is the effect of keyway cut into the shaft?

6. What are the different theories of failure?

7. What is the difference between endurance limit and fatigue strength of a material?

8. List two advantages of welded joints over riveted joints.

9. What are the applications of V-belt drive?

10. What types of stresses are induced in shafts?

PART-B Answer the following questions 5X8=40M

1. a) What are the steps involved in the design of machine elements? Explain.

b) Explain about Preferred numbers and their significance.

(or)

2. a) What are the methods of reducing stress concentration? Explain.

b) A forged steel bar, 50 mm in diameter, is subjected to a reversed bending stress of 250 N/mm2. The bar is made of steel 40C8

(Sut = 600 N/mm2). The corrected endurance limit of the bar is 100 N/mm2. Calculate the life of the bar for a reliability of 90%.

3. A steel connecting rod is subjected to a completely reversed axial load of 120 KN. Suggest the suitable size of the rod using a factor of

safety 1.8. The ultimate strength of the material is 1000 MPa.

Load correction factor 0.7

Size factor0.85

Surface finish factor 0.8

(Or)

4. A pulley is keyed to a shaft midway between two anti-friction bearings. The bending moment of the pulley varies from 150 Nm to

450 Nm as torsional moment of the shaft varies from 50 Nm to 150 Nm. The frequency of variation of the loads is the same as the shaft speed. The shaft is made of cold drawn steel having an ultimate strength of 550 MPa and yield strength of 310 MPa.

Determine the required diameter for an indefinite life. The stress concentration factor for the key way in bending and torsion may

be taken as 1.6 and 1.3 respectively. Use a design factor of 1.8, size factor 0.85 and surface correction factor 0.88.

Use for torsion,

Size correction factor = 0.6 and

The nominal design torsion stress = 0.6 Yield point in tension.

5. Design a double riveted butt joint with two cover plates for the longitudinal seam of a boiler shell 1.5 m diameter subjected

to a steam pressure of 0.95 N/mm2. Assume joint efficiency as 75 %, allowable tensile stress in the plate 90 MPa,

compressive stress 140 MPa and shear stress in the rivet 56 MPa.

(Or)

6. A safety valve, 60 mm in diameter is to blow off at a pressure of 1.2 N/mm2. It is held on its seat by means of a helical

compression spring with initial compression of 35 mm. The maximum lift of the value is 10 mm. The spring index is 5. The

maximum shear stress in the material of the wire is limited to 500 MPa and modulus of rigidity of the spring material is 80

GPa. Calculate wire diameter, mean coil diameter, number of active coils and pitch of the coil.

7. A hollow transmission shaft, having inside diameter 0.6 times the outside diameter, is made of plain carbon steel 40C8 (Syt =

380 N/mm2) and the factor of safety is 3. A belt pulley, 1000 mm in diameter, is mounted on the shaft, which overhangs

the left hand bearing by 250 mm. The belts are vertical and transmit power to the machine shaft below the pulley. The

tensions on the tight side and slack sides of the belt are 3 kN and 1 kN respectively, while the weight of the pulley is 500 N.

The angle of wrap of the belt on the pulley is 180°. Calculate the outside and inside diameters of the shaft.

(Or)

8. a) Derive the expression for the ratio of driving tensions for flat belt drive. 4M

b) Design a rubber belt to drive a dynamo generating 20 kW at 2250 rpm and fitted with a pulley 200 mm diameter. Assume

dynamo efficiency to be 85%. Take Allowable stress for belt = 2.1 MPa; Density of rubber = 1000 kg/m3; Angle of contact for

dynamo pulley = 165° and coefficient of friction between belt and pulley = 0.3.

9. Compute the diameter of a solid shaft which has to transmit 16KW power at 300 rpm. Ultimate shear stress per shaft material is

350 N/mm2 and factor of safety for design is 6. If a hollow shaft replaces the solid shaft, find the inside and outside diameters if the ratio is 0.5.

(Or)

10. A shaft is supported by two bearings placed 1.2 m apart. A 600 mm diameter pulley is mounted at a distance of 300mm to the

right of left hand bearing and this drives a pulley directly below it with the help of a belt having maximum tension of 2kN. Another

pulley 400 mm diameter is placed 200 mm to the left hand bearing and is driven with the help of an electric motor and belt which

is placed horizontally to the right. The angle of contact for both the pulleys is 1800and coefficient of friction is 0.24. Calculate the

diameter of the shaft taking working stresses of 63 Mpa in tension and 42 Mpa in shear.

****

________________________________________________****The End*****_____________________________________________










III B. Tech : I Sem : Mechanical Engineering I& II L T/P/D C

5 0 3

Course Name: Heat and Mass Transfer Course Code: 5ME10

Names of the Faculty Member: G K Pujari




1. PREREQUISITES

Thermodynamics, Partial differential equations.





• Measure the conduction mode of heat transfer in physical environment and to derive general mathematical equation.

• Measure the heat transfer through homogeneous slabs, hallow cylinders, spheres extended surfaces and fins.

• Measure convective mode of heat transfer.

• Measure heat transfer during radiation, boiling and condensation.

• Measure heat transfer through the different types of heat exchangers.





• Derive the general conduction equation in Cartesian, cylindrical and spherical co ordinates.

• Derive and apply equations in problems related to heat transfer through homogeneous slabs, hallow cylinders, sphere, extended

surfaces of fins.

• Derive and apply the convective heat transfer equations to natural and forced flow.

• Design the devices that transfers heat and measure their effectiveness.


(This mapping represents the contribution of course in attaining the program outcomes and there by program

educational objectives. This also helps in strengthening the curriculum towards the improvement of program.)

Course

Outcomes

(COs)


a b c d e F g h i j k l

CO 1 2 3 2 1 2 2

CO 2 3 3

2 3 2 3

CO 3 3 2 3 3 3

CO 4 2 3

2 2 3 2 2 2



(i) TEXTBOOKS

1. Fundamentals of Engineering Heat and Mass Transfer by R.C. Sachdeva; Publisher: New Age International.

2. Heat and Mass Transfer Data book by C.P. Kothandaraman; Publisher: New Age.

REFERENCES

1. Heat Transfer by OZSIK.

2. Heat Transfer by HOLMAN.

3. Heat Transfer by Sukhatme; Publisher: University Press.

4. Heat and Mass Transfer by D. S. Kumar.

5. Fundamentals of Heat & Mass Transfer by Incopera & Dewitt.


(Course delivery including latest trends brings good insight of the course in students and also inculcates the habit of self

learning among the students.


(a) Publications: NIL

(b) Open Learning Resources for self learning NIL

(iii) JOURNALS

NIL



adopted to engage the student in learning)

DM1: Chalk and Talk



NIL

8. ASSESSMENT





AM3: Home Assignments AM6: Quizzes

** (To be added for the courses as directed by the department. The no. of course projects is left to the liberty of faculty)


(The allotted marks for home assignments, quizzes and etc., except course projects are left to the liberty of faculty. But

for the finalisation of assignment marks, the following weightages can be considered.)

R15




the courses without

Course project

1. Home Assignments (AM3) 5%

10

5% 10

2. Quizzes (AM6) 5% 5%

3. Course project (AM7) -

4. Mid Term Examination (AM2) 30 30

5. Semester End Examination (AM1) 60 60

(i) HOME ASSIGNMENTS

(ii) QUIZZES

(iii) COURSE PROJECTS

10. SIMULATION SOFTWARES (If any)

-Nil




UNIT I

Introduction: Modes and mechanisms of heat transfer - Basic laws of heat transfer - Simple general discussion about applications of heat

transfer. Conduction Heat Transfer: Fourier heat conduction equation - General heat conduction equation in Cartesian, Cylindrical and

Spherical coordinates - simplification and forms of the field equation steady, unsteady and periodic heat transfer - Initial and boundary

conditions.

UNIT II

One Dimensional Steady State Conduction Heat Transfer: Homogeneous slabs, hollow cylinders and sphere - overall heat

transfer coefficient - electrical analogy - Critical radius of insulation - variable Thermal conductivity - systems with heat sources or Heat

generation - extended surfaces and fins. One Dimensional Transient Conduction Heat Transfer: Systems with negligible internal resistance

- chart solutions of transient conduction systems.

UNIT III

Convective Heat Transfer: Classification of systems based on causation of flow, condition of flow, configuration of flow and medium of

flow - Dimensional analysis as a tool for experimental investigation - Concepts about hydrodynamic and thermal boundary layers -

Buckingham Pi- Theorem and method, application for developing Semi - empirical non-dimensional correlation for convection heat

transfer - Significance of non -dimensional numbers - use of empirical correlations for convective heat transfer- Forced Convection: Flat

plates and horizontal pipes. Free Convection: Vertical plates and pipes.

UNIT IV

Heat Transfer with Phase Change: Heat transfer with boiling - pool boiling and film boiling - boiling curve for pool boiling - simple

correlations for pool boiling - Condensation plates heat transfer: film wise and drop wise condensation - film condensation on vertical and horizontal cylinders using empirical correlations.

Radiation Heat Transfer: Emission characteristics and laws of black-body radiation - incident radiation - total and monochromatic

quantities -laws of Planck, Wien, Kirchoff, Lambert, Stefan and Boltzmann - heat exchange between two black bodies -concepts of shape

factor - emissivity - heat exchange between grey bodies - radiation shields - electrical analogy for radiation net works.

UNIT V

Heat Exchangers: Classification of heat exchangers - overall and fouling resistance - problems using LMTD and NTU methods.

Introduction to Mass Transfer: Analogy between heat, mass and momentum transfer - classification: Diffusion and convective mass

transfer processes - Examples - Fick's Law of diffusion simple problems for steady state molecular diffusion - Convection mass transfer

coefficient - non-dimensional numbers of mass transfer analogous to convection heat transfer

TEACHING PLAN

S.

No.

Contents of syllabus to be

taught

No. of

Lecture

Periods

Lecture

Dates

Proposed Delivery

Methodologies

Learning Resources

/ References

(Text Books /

Journals /

Publications/ Open

Learning

Resources)

Course

Outcomes

60)

UNIT – I

Introduction: Modes and

mechanisms of heat transfer.

2 3/07/17 &

4/07/17 Chalk and Talk

Text Books & Other

Heat Transfer Books

Importance

of Heat

Transfer and

development

of Heat

Transfer

equations for

different

geometry

61)

Basic laws of heat transfer - Simple

general discussion about applications

of heat transfer.

2 05/07/17 Chalk and Talk

Text Books & Other

Heat Transfer Books

62) Conduction Heat Transfer: Fourier 2 07/07/17 Chalk and Talk Text Books & Other

heat conduction equation. Heat Transfer Books

63) General heat conduction equation in

Cartesian coordinates. 2 10/07/17 Chalk and Talk

Text Books & Other

Heat Transfer Books

64)

Cylindrical and Spherical coordinates

- simplification and forms of the field

equation


Text Books & Other

Heat Transfer Books

65) steady, unsteady and periodic heat

transfer 2 12/07/17 Chalk and Talk

Text Books & Other

Heat Transfer Books

66) Initial and boundary conditions 1 14/07/17 &


Text Books & Other

Heat Transfer Books Applying

boundary

conditions

67)

UNIT - II

One Dimensional Steady State

Conduction Heat Transfer:

Homogeneous slabs


Text Books & Other

Heat Transfer Books

Simplifivcation

of 3D Heat

Transfer

equations to

1D for

different

geometry

68)

hollow cylinders and sphere - overall

heat transfer coefficient - electrical

analogy


Text Books & Other

Heat Transfer Books

69) Critical radius of insulation 2 07/08/17 Chalk and Talk

Text Books & Other

Heat Transfer Books

70) variable Thermal conductivity 1 08/08/17 Chalk and Talk Text Books & Other

Heat Transfer Books

71) systems with heat sources or Heat

generation 2 09/08/17 Chalk and Talk

Text Books & Other

Heat Transfer Books

72) Extended surfaces and fins 3 11/08/17 Chalk and Talk

Text Books & Other

Heat Transfer Books

73)

One Dimensional Transient Conduction

Heat Transfer: Systems with negligible

internal resistance - chart solutions of

transient conduction systems


Text Books & Other

Heat Transfer Books

Problem

solution for

unsteady state

Heat

Transfer

74)

UNIT III Convective Heat Transfer:

Classification of systems based on

causation of flow, condition of flow,


Text Books & Other

Heat Transfer Books Importance of

convection

and

configuration of flow and medium of

flow

development

of a tool for

non

dimensional

numbers and

use of

correlations

for different

cases

75) Dimensional analysis as a tool for

experimental investigation 2 12/09/17 Chalk and Talk

Text Books & Other

Heat Transfer Books

76) Concepts about hydrodynamic and

thermal boundary layers 2 13/09/17 Chalk and Talk

Text Books & Other

Heat Transfer Books

77) Buckingham Pi- Theorem and method 1 15/09/17 &


Text Books & Other

Heat Transfer Books

78)

Application for developing Semi -

empirical non-dimensional correlation

for convection heat transfer

2 19/09/17 &


Text Books & Other

Heat Transfer Books

79)

Significance of non -dimensional

numbers - use of empirical correlations

for convective heat transfer


Text Books & Other

Heat Transfer Books

80) Forced Convection: Flat plates and

horizontal pipes 2 26/09/17 Chalk and Talk

Text Books & Other

Heat Transfer Books

81) Free Convection: Vertical plates and

pipes 2

27/09/17 &


Text Books & Other

Heat Transfer Books

82)

UNIT IV Heat Transfer with Phase Change:

Heat transfer with boiling - pool boiling

and film boiling


Text Books & Other

Heat Transfer Books Importance of

heat transfer

with change

83) boiling curve for pool boiling - simple

correlations for pool boiling 1

7/10/17 &


Text Books & Other

Heat Transfer Books

of face and

use of

equations

84) Condensation plates heat transfer: film

wise and drop wise condensation 2

10/10/17 &


Text Books & Other

Heat Transfer Books

85)

film condensation on vertical and

horizontal cylinders using empirical

correlations


Text Books & Other

Heat Transfer Books

86)

Radiation Heat Transfer: Emission

characteristics and laws of black-body

radiation - incident radiation

1 18/10/17 & Chalk and Talk

Text Books & Other

Heat Transfer Books

Importance of

radiation and

design of

equipment for

radiation heat

Transfer

87)

Total and monochromatic quantities -

laws of Planck, Wien, Kirchoff, Lambert,

Stefan and Boltzmann


Text Books & Other

Heat Transfer Books

88) Heat exchange between two black

bodies -concepts of shape factor 1 21/10/17 Chalk and Talk

Text Books & Other

Heat Transfer Books

89)

Emissivity - heat exchange between grey

bodies - radiation shields - electrical

analogy for radiation net works


Text Books & Other

Heat Transfer Books

90) Radiation shields - electrical analogy for

radiation net works 2 23/10/17 Chalk and Talk

Text Books & Other

Heat Transfer Books

91)

UNIT V Heat Exchangers: Classification of

heat exchangers - overall and fouling

resistance


Text Books & Other

Heat Transfer Books

Design of heat

exchangers

for different

92) Problems using LMTD and NTU

methods 2 25/10/2017 Chalk and Talk

Text Books & Other

Heat Transfer Books

applications

and different

configurations

93)

Introduction to Mass Transfer:

Analogy between heat, mass and

momentum transfer


Text Books & Other

Heat Transfer Books

94) classification: Diffusion and convective

mass transfer processes - Examples 2 27/10/2017 Chalk and Talk

Text Books & Other

Heat Transfer Books

95) Fick's Law of diffusion simple problems

for steady state molecular diffusion 2 28/10/2017 Chalk and Talk

Text Books & Other

Heat Transfer Books

96) Convection mass transfer coefficient 2 30/10/2017 Chalk and Talk Text Books & Other

Heat Transfer Books

97)

non-dimensional numbers of mass

transfer analogous to convection heat

transfer

2

31/10/2017

&

04/11/2017

Chalk and Talk

Text Books & Other

Heat Transfer Books

98) Chalk and Talk Text Books & Other

Heat Transfer Books

TUTORIAL QUESTIONS

Assignment – 1

1. A furnace wall is made of inside silica brick (k= 5W/mK) of thickness 12cm and outside magnesite brick (k=5.86W/mk) of

thickness 15cm. The temperature at the inside surface of the silica brick is 900oC and outside magnesite brick surface temperature is

150o C.

Calculate

(i) Heat flow through composite wall.

(ii) If contact resistance between wall is 0.00257 m2 K/W, also calculate temperature drop in the interface.

2. Derive an expression for amount of heat transfer and temperature distribution for Fin of long length?

3. What is meant by Buckingham theorem. Can you explain the various parameters used in natural convection? Using dimensional

analysis obtain an expression for nusselt number in term of Reynold’s & prandtl numbers.

4.

5. a) Define and explain Fourier’s law of heat conduction.

b) A steel tube (k = 43 W/m-K) of 2.54 and 3.81 cm inner and outer radii is covered with a 2.54 cm layer of asbestos (k = 0.208 W/m-K). The

inside surface of the tube receives heat by convection from a hot gas at a temperature of Ta = 216oC with a heat transfer coefficient (ha = 284

W/m2-K, while the outer surface of the insulation is exposed to the ambient air at T∞ = 38oC with a heat transfer coefficient of h∞ = 17

W/m2-K. The length of the tube is 3 m. Estimate (i) the total thermal resistance, (ii) the heat loss from the hot gas to ambient air, and (ii) the

temperature at the interface between the metal wall and asbestos insulation.

6. a) What are Heisler’s charts, and how are they useful? Explain.

b) An iron rod of 6.25 cm radius is heated in a furnace to a uniform temperature of 200oC. It is cooled by forced convection of air, which is at

40oC. Assuming the heat transfer coefficient on the surface of the rod as 150 W/m2-K, find (a) the time required to cool the centre of the rod

to 100oC, and (b) the surface temperature when the centre temperature is reached to 100oC. Assume k = 36 W/m-K and α = 0.97x10-5 m2/s

for the iron rod.

7. a) Explain about the thermally developing and developed regions when a fluid flows through a tube, whose wall is heated.

b) Water flows through a tube of 2.54 cm diameter and 3 m length at a mean velocity of 2 cm/s. The water enters the tube at a temperature

of 60oC. The tube wall temperature is maintained constant at 80oC. Calculate the following: (i) the average convection heat transfer

coefficient, (ii) the rate of heat transferred to water from the tube wall, and (iii) the exit temperature of water.

Assignment – 1I

1. a) What is meant by critical heat flux in nucleate boiling? Explain.

b) Water is boiled at atmospheric pressure in a copper pan of 0.3m diameter. If the bottom temperature of the copper pan is 118oC,

calculate (i) the boiling heat flux, and (ii) the evaporation rate of water in kg/hr. The properties of water are: Tsat = 100oC, density, specific

heat and viscosity are 957.9 kg/m2, 4217 J/kg-K, and 2.79x10-4 kg/m-s respectively. Prandtl number and latent heat of vaporization are 1.76

and 2257 kJ/kg respectively. Surface tension = 0.0589 N/m. The density of steam is 0.5955 kg/m3.

2. a) Define and explain (i) log mean temperature difference, and (ii) overall heat transfer coefficient in a heat exchanger.

b) Hot oil, having a specific heat of 1.9 kJ/kg-K, enters a heat exchanger at a temperature of 200oC with a mass flow rate of 2.77 kg/s. Water

at flow rate of 0.83 kg/s is available at 20oC as a coolant. Calculate the exit temperatures of the oil and water if the heat exchanger is

operated in counter flow. The over-all heat transfer coefficient and surface area of heat exchanger are 300 W/m2-K and 17.5 m2

respectively.

3. a) Derive the equation for heat exchange between a small gray body and a large gray enclosure.

b) Two equal discs of diameter 200 mm each are arranged in two parallel planes 400 m apart. The temperature of the first disc is 500oC and

that of the second disc is 300oC. Determine the radiating heat flux between them, if these are

(i) Black (ii) Gray with emissivities 0.3 and 0.5 respectively.

8. A horizontal cylinder of 5cm in diameter and 1m long maintained at a uniform temperature of 140oC is exposed to atmospheric air

at 10oC. Calculate the free convection heat transfer coefficient and compare the value that is obtainable from simplified expression.

9. Water flows at a rae of 70 kg/min. through a double pipe counter flow heat exchanger. Water is heated from 50oC to 80oC by oil

flowing through the tube. The specific heat of oil is 2kgJ/kgK. Oil enters at 115oC and leaves at 75oC. The overall heat transfer

coefficient is 350W/m2K. Calculate the heat transfer area required.

10. Write short note on the following.

(a) heisler charts.

(b) Non-Dimensional numbers

(c) Heat exchanger design criteria

MODEL QUESTION PAPER




SUBJECT: HEAT AND MASS TRANSFER

(COMMON TO ME & AE)


------------------------------------------------------------------------------------------------------------------------------------------------------------------

PART-A


i. Explain the concept of critical thickness of insulation. CO2

ii. Explain the The conduction shape factor CO1

iii. List the various factors on which the value of convective heat transfer coefficient depends. CO3

iv. Distinguish between a black body and grey body. CO2

v. How does radiation play an important role in boiling heat transfer? CO4

vi. Distinguish between conduction, convection and radiation modes of heat transfer. CO2

vii. What are Fourier and Biot numbers? What is their physical significance? CO3

viii. Explain the development of hydrodynamic and thermal boundary layers over a flat plate CO4

ix. State and explain Kirchoff’s identity. What are the conditions under which it is applicable? CO1

x. Define heat exchanger effectiveness and explain its significance. CO2

Part-B


UNIT I

Subject Code

5ME10

R15

1) Derive the general heat conduction equation in Cartesian co- ordinators. CO2

(OR)

2) Briefly discuss the three modes of heat transfer with examples. Explain Fourier heat conduction equation. CO1

UNIT II

3) Derive the expression for temperature distribution under one dimensional steady state heat conduction for a cylinder. CO3

(OR)

4) A cylinder nickel steel(40% Ni) billet of 0.1 m diameter and 0.5 m length, initially at 800O C is suddenly dropped in a large vessel containing oil

at 30O C. The convective heat transfer between the billet and oil is 20 W/m2 K. Calculate the time required for billet to reach a temperature of

250O C. CO2

UNIT III

5) Consider a 0.25 m long vertical plate that is at 700 C. The plate is suspended in quiescent air that is at 250 C. Estimate the velocity boundary

layer thickness and maximum upward velocity at the trailing edge of the plate. How does the boundary layer thickness compare with the

thickness that would exist if the air were flowing over the plate at a free stream velocity of 5 m/s? CO4

(OR)

6) Obtain the general form of equation for natural convective heat transfer using dimensional analysis. CO2

UNIT IV

7) A long cylinder having a diameter of 2 cm is maintained a 6000 C and has an emissivity of 0.4. Surrounding the cylinder is another long, thin

walled concentric cylinder having a diameter of 6cm and an emissivity 0f 0.2 on both the inside and outside surfaces. The assembly is located in

a large room having a temperature of 270 C. Calculate the net radiant energy lost by the 2 cm diameter cylinder per meter length. Also calculate

the temperature of the 6 cm diameter cylinder. CO3

(OR)

8) Distinguish between film wise and drop wise condensation. Which of the two gives higher heat transfer coefficient? WhyCO4

UNIT V

9) Cold water at 1495 kg/hr enters at 25 0C through a parallel flow heat exchanger to cool 605 kg/hr of hot water entering at 70 0C and leaving at 50

0C. Find the area of heat exchanger the individual heat transfer coefficients on both sides are 1590W/m2-K. Use LMTD and NTU methods. Find

the exit temperature of cold and hot streams if the flow of hot water is doubled. Assume the individual heat transfer coefficient is proportional to

0.8 th power of flow rate. For water Cp = 4180 J/kg-K. CO2

(OR)

10) Define the convective mass transfer coefficient. Discuss the analogy between heat and mass transfer. CO1









(III) B. Tech :(I) Sem : (MECHANICAL)-(ME-1) L T/P/D C

4 0 3

Course Name: Turbo Machines

Course Code: 5ME11

Names of the Faculty Member : MR.P.PRASAD KUMAR

Number of working days : 90

Number of Hours/week : 4

Total number of periods planned : 64

1. PREREQUISITES

(This information helps the student to refer to the required topics before undergoing the course. This builds confidence

in a student.)

Maths, Physics, Thermo Dynamics , Thermal Engineering-1.




• Understand various energy conversations that take place in a turbo machines.

• Understand the principles of turbo machines.

• Understand governing mathematical equations to perform theoretical calculations.




assessable. The blooms taxonomy terms are used as reference in defining course outcomes) • Model and analyze problems in turbo machines.

• Design a simple energy producing or effort reducing device using basic thermodynamics concepts.

• Suggest and improvements to minimize losses.


Course

Outcomes

(COs)



CO 1 1 2 3

2

1

CO 2 1 3 2

1

2

CO 3 3 2 1

2

1


5. LEARNING RESOURCES:

(i) TEXT BOOKS

1- Thermal Engineering by Rathore; Publisher: Tata McGraw Hill.


(Course delivery including latest trends brings good insight of the course in students and also inculcates the habit

of self learning among the students.


(a) Publications

1 – Gas Turbines by V. Ganesan; Publisher: Tata McGraw Hill. 2 -- Thermal Engineering by R.K Rajput; Publisher: Lakshmi Publications. 3 -- Thermal Engineering by P. L. Ballaney; Publisher: Khanna. 4 -- Fundamentals of Turbo Machinery by B. K. Venkanna; Publisher: Prentice Hall International. 5 – Steam and Gas Turbines by R.Yadav; Central Publishing House


• Google, YouTube, Wikipedia

(iii) JOURNALS

J1. International Journal of Thermal Engineering

J2. Journal of Thermal Engineering

J3. International journal of thermal sciences



adopted to involve the student in learning)

DM1: Chalk and Talk

DM4: Demonstration (Physical / Laboratory / Audio Visuals)



-Nil

8. ASSESSMENT




AM1: Semester End Examination AM2: Mid Term Examination

AM3: Home Assignments

** COURSE PROJECTS

(To be added for the courses as directed by the department. The no. of course projects is left to the liberty of

faculty.

One course project is assigned to each project batch of size three in the beginning of the course and assessed at

the end of the course. One midterm evaluation is carried out to monitor the progress of the project and the team

coherence.)


(The allotted marks for home assignments, quizzes, course projects and etc., are left to the liberty of faculty. But for the

finalisation of assignment marks, the following weightages can be considered.)

For R15

S. No. Assessment Methodology


the courses with Course

project


the courses without

Course project

1.

Assignment

3%

10

5% 10

2. 3% 5%

3. Course project 4% -

4. Internal Examination 30 30

5. External Examination 60 60

10.SIMULATION SOFTWARES (If any)

Nill




UNIT I

STEAM GENERATORS:

Introduction, Classification of Boilers , Working Principles of Fire Tube and Water Tube Boilers, Low Pressure boilers, High Pressure Boilers – Babcock and Wilcox ,

Lamont Boiler, Boiler draught and performance of boilers, Equivalent evaporation.

STEAM CONDENSORS:

Introduction, purpose and types of condensers. Efficiency of condenser, air pumps.

Learning Outcomes:

1. Classify boilers

2. Understand working principles of different boilers

3. Define boiler performance parameters

4. Understand working of a chimney

5. Define efficiency of chimney

6. Understand different draughts

7. Understand importance of steam condensers and classify them

8. Define vacuum efficiency and condenser efficiency

9. Understand the working of air pump

Lecture Plan:

S. No. Topic Name

Reference

Books, Mode

of Teaching

Lecture

Dates Number of

Periods

Proposed

Delivery

Methodologies

CO’s

UNIT-I Steam Generators and Steam Condensers:

1

Boilers: Classification – Working principles – Fire tube and

Water tube.

T1,R2,R3,

PPT, Video

4/7/17 2 DM1. Chalk and

Talk.

DM4. Detailed

analysis with the

help of practical

examples

CO1

2

L.P and H.P boilers -- Babcock and Wilcox , Lamont Boiler T1,R2,R3,

PPT, Video


Talk.

DM4. Detailed

analysis with the

help of practical

examples

CO1

3

Boiler draught T1,R2,R3,

PPT, Chalk &

Talk


Talk.

CO1

4

Performance of boilers, Equivalent evaporation T1,R2,R3,

Chalk & Talk

/7/17 2 DM4. Detailed

analysis with the

help of practical

CO1

examples

5

STEAM CONDENSORS:

Introduction, purpose and types of condensers T1,R2,R3,

PPT

11/7/17

2

DM1. Chalk and

Talk.

CO1

6

Efficiency of condenser, air pumps.

T1,R2,R3,

PPT, Chalk &

Talk

13/7/17

3

DM4. Detailed

analysis with the

help of practical

examples

CO1

STEAM BOILERS

a) Classify different types of boilers. Also explain the working of Lamont boiler with a neat sketch.

b) What is Economiser and air preheater?

c) Differentiate between boiler mountings and accessories.

d) Differentiate between fire tube and water tube boilers.

e) Explain the working and construction of any one type of fire tube boiler with a neat sketch.

f) Derive the condition for the maximum discharge through the chimney? And write the expression for maximum discharge.

UNIT II

STEAM NOZZLES:

Functions of nozzle, applications, types, flow through nozzles, Thermodynamic analysis, assumptions, velocity at nozzle exit, Ideal and actual

expansion in nozzle, velocity co-efficient, condition for maximum discharge, nozzle efficiency, Critical pressure ratio, Supersaturated flow and its

effects, degree of super saturation, degree of under cooling, wilson line.

Learning Outcomes: After successful completion of Unit – II the student must be able to

1. Understand the functions and applications of nozzles

2. Analyze the nozzles

3. Define velocity co-efficient

4. Obtain condition for maximum discharge

5. Define critical pressure ratio

6. Define degree of saturation and degree of under cooling

Lecture Plan:

S. No. Topic Name

Reference

Books, Mode

of Teaching

Lecture

Dates Number of

Periods

Proposed

Delivery

Methodologies

CO’s

UNIT – II Steam Nozzles

1

Steam Nozzles: Function of nozzle – applications - types,

Flow through nozzles,

T1,R2,R3,

PPT, Chalk &

Talk

24/8/17 2 DM1. Chalk

and Talk

(along with

PPT)

CO2

2

Thermodynamic analysis – assumptions -velocity of nozzle at

exit-Ideal and actual expansion in nozzle, velocity

coefficient, condition for maximum discharge, critical

pressure ratio, criteria to decide nozzle shape

T1,R2,R3,

Chalk & Talk

29/8/17 4 DM4.

Demonstration

of one

example.

CO2

3

Super saturated flow, its effects. T1,R2,R3,

PPT

16/8/17 1 DM1. Chalk

and Talk

(along with

PPT)

CO2

4

Degree of super saturation and degree of under cooling -

Wilson line

T1,R2,R3,

PPT

23/8/17 2 DM4.

Demonstration

of one

example.

CO2

STEAM NOZZLES

1. Explain the function of steam nozzles, state its types and derive the expression for the calculation of steam velocity at the exit of the nozzle with

the help of steady flow energy equation.

2. In a steam nozzle, superheated steam at a pressure of 20 bar and a temperature of250oC expands adiabatically to an exit pressure of 1.5 bar. If

the mass flow rate of steam is 1.5 kg/sec, calculate the velocity of steam at the exit of the nozzle (neglecting the inlet velocity), and exit area of

the nozzle.

3. Write the applications of Nozzle.

4. Explain the significance of critical pressure ratio.

5. What do you mean by nozzle efficiency? How is it related to the velocity coefficient of the nozzle?

6. Discuss the effect of friction on flow through steam nozzle with the help of h-s diagram.

7. Steam enters a convergent-divergent nozzle at 2MPa and 4000Cwith a negligible velocity and mass-flow rate of 2.5kg/s and it exits at a pressure

of 300KPa. The flow is isentropic between the nozzle entrance and throat and overall nozzle efficiency is 93 %. Determine throat and exit areas.

8. Derive an expression for the discharge through the steam nozzle.Derive the condition for the maximum discharge through the nozzle? And write

the expression for maximum discharge

UNIT III

STEAM TURBINES:

Impulse turbine - Mechanical details, velocity diagram, effect of friction, power developed, axial thrust, diagram efficiency, Condition for maximum

efficiency, Methods to reduce rotor speed - velocity compounding, pressure compounding, combined velocity and pressure compounding, velocity and

pressure variation along the flow.

Reaction Turbine - Mechanical details, principle of operation, Thermodynamic analysis of a stage, Degree of reaction, velocity diagram, parson’s

reaction turbine, condition for maximum efficiency.

Learning Outcomes: After successful completion of Unit – III the student must be able to

1. Classify steam turbines

2. Understand effect of friction

3. Understand methods to reduce rotor speed -- compounding

4. Calculate turbine power output.

5. Define diagram efficiency, Stage efficiency.

6. Understand principle of reaction turbine

7. Define degree of reaction

8. Draw velocity diagrams

9. Derive the condition for maximum efficiency.

Lecture Plan:

S. No. Topic Name

Reference

Books, Mode

of Teaching

Lecture

Dates Number of

Periods

Proposed

Delivery

Methodologies

CO’S

UNIT III Steam Turbines:

1

Steam Turbines: Classification. Impulse turbine:

Mechanical details T1,R2,R3,R5,

PPT, Video

31/8/17 1

DM1. Chalk

and Talk

(along with

PPT)

CO3

2

Velocity diagram – effect of friction – power developed,

axial thrust, blade or diagram efficiency – condition for

maximum efficiency.

T1,R2,R3,R5,

PPT, Chalk &

Talk

15/9/17 2

DM4.

Demonstration

of one

example.

CO3

3

Methods to reduce rotor speed-Velocity compounding and

pressure compounding combined velocity and pressure

T1,R2,R3,R5,

PPT, Chalk &

Talk

16/9/17 3

DM1. Chalk

and Talk

(along with

CO3

compounding. PPT)

4

Velocity and Pressure variation along the flow

T1,R2,R3,R5,

PPT, Chalk &

Talk

19/9/17 1

DM4.

Demonstration

of one

example.

CO3

5

Reaction Turbine : Mechanical details – principle of

operation, thermodynamic analysis of a stage, T1,R2,R3,R5,

PPT, Chalk &

Talk

27/9/17 2

DM1. Chalk

and Talk

(along with

PPT)

CO3

6

Degree of reaction –velocity diagram – Parson’s reaction

turbine – condition for maximum efficiency T1,R2,R3,R5,

Chalk & Talk

22/9/17

3

DM4.

Demonstration

of one

example.

CO3

STEAM TURBINES

1. In a stage of an impulse turbine provided with a single row wheel, the mean diameter of the blade ring is 100 cm and the speed of rotation is

3000 rpm. The steam issues from the nozzles with a velocity of 360 ms and the nozzle angle is 20°. The rotor blades are equiangular and due to

friction in the blade channel the relative velocity of steam at the outlet from the blades is 0.85 times of that at the inlet. Determine the power

developed in the blades when the axial thrust on the blade is 160 N.

2. What do you mean by degree of reaction and show that the blades are symmetric for 50% degree of reaction?

3. What is the purpose of governing in steam turbine?

4. What is the effect of low vacuum in a steam turbine?

5. Write the classification of Turbines?

6. Explain the working principle of a simple impulse steam turbine with a neat sketch.

7. How does a reaction turbine differ from an impulse turbine?

8. Explain briefly the combined velocity triangle diagram for the impulse reaction turbine and also mention all the terms clearly.

9. Explain briefly what is compounding and types of compounding with a neat diagram.

UNIT IV

ROTARY COMPRESSORS:

Working Principles of - Roots blower, vane blower and screw compressor.

CENTRIFUGAL COMPRESSORS:

Mechanical details and principle of operation, velocity and pressure variation. Energy transfer. Impeller blade shape-losses, slip factor, power input

factor, pressure co-efficient and adiabatic co-efficient, velocity diagrams.

AXIAL FLOW COMPRESSORS:

Mechanical details and principle of operation, velocity triangles and energy transfer per stage, degree of reaction, work done factor, Isentropic

efficiency, pressure rise calculations, Polytrophic efficiency.

Learning Outcomes: After successful completion of Unit – IV the student must be able to

1. Classify compressors

2. Understand working of centrifugal and axial flow compressors

3. Draw velocity diagrams

4. Calculate power requirements and efficiency.

5. Understand phenomenon of surging, choking.

Lecture Plan:

S. No. Topic Name

Reference

Books, Mode

of Teaching

Lecture

Dates Number of

Periods

Proposed

Delivery

Methodologies

CO’S

UNIT IV Rotary, Centrifugal and Axial flow Compressors

1

ROTARY COMPRESSORS:

Working Principles of - Roots blower, vane blower and

screw compressor. T1,R4,R2,R3,

PPT

23/9/17

2

DM1. Chalk

and Talk

(along with

PPT)

CO4

2

CENTRIFUGAL COMPRESSORS:

Mechanical details and principle of operation T1,R4,R2,R3,

PPT, Chalk &

Talk

6/10/17

1

DM4.

Demonstration

of one

example.

CO4

3

Velocity and pressure variation. Energy transfer. Impeller

blade shape-losses, slip factor, power input factor, pressure

co-efficient and adiabatic co-efficient, velocity diagrams.

T1,R4,R2,R3,

Chalk & Talk

7/10/17

4

DM1. Chalk

and Talk

(along with

PPT)

CO4

4

AXIAL FLOW COMPRESSORS:

Mechanical details and principle of operation T1,R4,R2,R3,

Chalk & Talk

17/10/17 1

DM4.

Demonstration

of one

CO4

example.

5

Velocity triangles and energy transfer per stage, degree of

reaction, work done factor, Isentropic efficiency, pressure rise

calculations, Polytrophic efficiency.

T1,R4,R2,R3,

Chalk & Talk

28/10/17

3

DM1. Chalk

and Talk

(along with

PPT)

CO4

ROTARY COMPRESSORS:

1. Make a comparison between Reciprocating and Rotary compressors.

2. In an eight stage axial flow compressor, the overall pressure ratio achieved is 5:1 with an overall isentropic efficiency of 90%. The temperature

and pressure at inlet are 20 C and 1 bar. The work is divided equally between the stages. The mean blade speed is 175 m/s and 50% reaction

design is used. The axial velocity through the compressor is constant and equal to 100 m/s. Calculate the power required for a flow rate of 80

kg/s and blade angles.

3. Derive the expression for energy transfer per stage in an Axial flow turbine.

4. Draw the velocity diagrams of centrifugal compressor and mention its components.

5. Define Degree of Reaction.

UNIT V

GAS TURBINES:

Classification of Gas Turbines ,Ideal cycle, essential components ,parameters of performance, actual cycle , regeneration ,inter cooling and reheating,

closed and semi closed cycles, merits and demerits, combustion chambers and turbines for Gas Turbine plants.

JET PROPULSION:

Principle of operation, Classification of Jet propulsion engines, working principles with schematic diagram and representation on T-s diagram, Thrust,

Thrust power and propulsion efficiency. Needs and demands met by Turbo Jet Engines, Schematic diagram, Thermodynamic cycle, performance

evaluation thrust augmentation methods.

ROCKETS:

Application - working principle, Classification, Propellant type, Thrust, Propulsive efficiency – Specific impulse, solid and liquid propellant Rocket

Engines.

Learning Outcomes: After successful completion of Unit – V the student must be able to

1. Classify gas turbines

2. Understand regeneration and reheating

3. Differentiate between closed and open cycle gas turbines

4. Find performance of gas turbine power plant

5. Understand principles of jet propulsion

6. Classify jet propulsive engines

7. Define thrust power and propulsive efficiency

8. Understand working principle of rockets

9. Classify rockets

10. Define efficiency and specific impulse of rockets

Lecture Plan:

S. No. Topic Name

Reference

Books, Mode

of Teaching

Lecture

Dates Number of

Periods

Proposed

Delivery

Methodologies

CO’S

UNIT V Gas Turbines, Jet Propulsion and Rockets

1

Gas Turbines: Classification of gas turbines, Ideal cycle,

essential components.

T1,R1,R4,R5,

PPT, Video

31/11/17 1

DM1. Chalk

and Talk

(along with

PPT)

DM4.

Demonstration

of one

example.

CO5

2

Parameters of performance, actual cycle, regeneration, inter

cooling and reheating.

T1,R1,R4,R5,

Chalk & Talk

1/11/17 2

DM1. Chalk

and Talk

(along with

PPT)

DM4.

Demonstration

of one

example.

CO5

3

Closed and Semi-closed cycles, merits and demerits.

T1,R1,R4,R5,

Chalk & Talk

3/11/17

2

DM1. Chalk

and Talk

(along with

PPT)

CO5

DM4.

Demonstration

of one

example.

4

Combustion chambers and turbines of Gas Turbine Plant. T1,R1,R4,R5,

Chalk & Talk

4/11/17 2

DM1. Chalk

and Talk

(along with

PPT)

DM4.

Demonstration

of one

example.

CO5

5

Jet Propulsion: Principle of Operation, Classification of jet

propulsive engines

T1,R1,R4,R5,

PPT

5/11/17 1

DM1. Chalk

and Talk

(along with

PPT)

DM4.

Demonstration

of one

example.

CO5

6

Working Principles with schematic diagrams and

representation on T-S diagram, Thrust, Thrust Power and

Propulsion Efficiency

T1,R1,R4,R5,

PPT

6/11/17

2

DM1. Chalk

and Talk

(along with

PPT)

DM4.

Demonstration

of one

CO5

example.

7

Needs and Demands met by Turbo jet engines, Schematic

Diagram, Thermodynamic Cycle

T1,R1,R4,R5,

PPT, Chalk &

Talk

7/11/17 1

DM1. Chalk

and Talk

(along with

PPT)

DM4.

Demonstration

of one

example.

CO5

8

Performance Evaluation Thrust Augmentation – Methods. T1,R1,R4,R5,

Chalk & Talk

8/11/17 1

DM1. Chalk

and Talk

(along with

PPT)

DM4.

Demonstration

of one

example.

CO5

9

Rockets: Application, Working Principle, Classification,

Propellant Types

T1,R1,R4,R5,

Chalk & Talk

8/11/17

1

DM1. Chalk

and Talk

(along with

PPT)

DM4.

Demonstration

of one

example.

CO5

10

T1,R1,R4,R5,

Chalk & Talk

2

DM1. Chalk

and Talk

CO5

Propulsive efficiency – Specific impulse, solid and liquid

propellant Rocket Engines.

8/11/17

(along with

PPT)

DM4.

Demonstration

of one

example.

GAS TURBINES:

1. In a gas turbine plant working on Brayton cycle the air at the inlet is at 27 C and 0.1 MPa. The pressure ratio is 6.25 and the maximum

temperature is 860C. The turbine and compressor efficiencies are each 80 %. Find (i). The compressor work done per kg of air (ii) the turbine

work done per kg of air (iii) Heat supplied per kg of air (iv) the cycle efficiency (v). The turbine exhaust temperature.

2. A turbo jet engine flying at a speed of 900 km/h consumes air at the rate of 50 kg/s. Calculate (i) Exit velocity of jet when the enthalpy change

for nozzle is 250 kJ/kg and the velocity coefficient is 0.98 (ii) the fuel consumption for an Air fuel ratio of 80:1 (iii) Thrust specific fuel

consumption (iv) Propulsive power and (v) Propulsive efficiency.

3. Give the properties of the propellants used in Rockets.

4. Sketch P_V and T-S diagrams for a Brayton cycle.

5. Define thrust, thrust power and propulsive efficiency

6. Compare closed cycle gas turbine with open cycle gas turbine.

Subject Code MED1119

R12


B.Tech. III Year II Semester Supplementary Examinations, May, 2016 TURBO MACHINES

(ME) Time: 3Hours Max. Marks: 70M

Note: Steam tables are permitted

PART-A (Answer ALL Questions)

1. Answer in one sentence 5X1=5M

a) State the function of boilers.

b) Write short notes on nozzle efficiency.

c) List the different losses in steam turbine.

d) What is degree of reaction?

e) What is slip in centrifugal compressor? 2. Answer the following very briefly 5X2=10M

a) Write a shot note on fire tube boiler.

b) What is critical pressure?

c) Gas turbines tend to be always of reaction type. Why? d) Write a short note on velocity diagrams.

e) What is work done factor? 3. Answer the following briefly. 5X3=15M

a) State the significance of first and second law of thermodynamics applied to a turbo machines.

b) What are the various effects of supersaturated flow?

c) What are the factors considered to select the type of turbine for the particular application?

d) Briefly explain the slip factor.

e) Differentiate between polytrophic efficiency and isentropic efficiency.

PART – B Answer any FOUR Questions 4X10=40M

4. Draw a neat sketch explains the working of Lamont, Fire and water tube boiler and also explain the function of air pump in

steam power plant.

5. Derive the expression for velocity at nozzle exit and velocity co-efficient.

6. An axial flow turbine operates a 6 MW alternator at 150 rpm under a head of 7.5 m. The alternator efficiency is 95% and

overall efficiency of turbine is 90 %.The tip diameter of runner is 5 m and hub diameter is 2.75 m. Assuming the hydraulic

efficiency as 94 % and no exit whirl, calculate the runner vane angles at inlet and outlet at mean diameter of vanes.

7. Explain the two stage pressure compounded and two stage velocity compounded impulse turbine.

8. An inward flow reaction turbine works under a head of 110 mm. The inlet and outlet diameters of the runner are 1.5 m and

1.0 m respectively. The width of the runner is constant throughout as 150 mm. The blade angle at outlet is 15o. The

hydraulic efficiency is 0.9. Calculate: i) The speed of the turbine ii) The blade angles iii) The power produced when the

discharge velocity is 6 m/s.

9. Draw the velocity triangles at inlet and outlet of an axial flow compressor from the following data. Degree of reaction 0.5,

inlet blade angle 45o, axial velocity of flow which is constant throughout 120 m/s, speed of rotation 6500 rpm, radius of

rotation 20 cm, blade speed at inlet is equal to blade speed at outlet. Calculate angles at inlet and outlet. Also calculate power

needed to handle 1.5 kg/s of air.

Subject Code 13MED013

R13


B.Tech. III Year I Semester Supplementary Examinations, May/June, 2016

TURBO MACHINERY (ME)

Time: 3Hours Max. Marks: 70M PART-A

1. Answer in one sentence 5Х1=5M

g) Write the function of Blow of cock h) Explain the equation of Exit velocity of steam in nozzle. i) What is the use of an air pump in the condenser? j) What is blade velocity coefficient? k) Write the equation of work for a single stage air compressor when clearance is considered?

2. Answer the following very briefly. 5X2=10M

a) What is the necessity of compounding of steam turbines? b) Write few sources of air leaks in to condenser. c) What do you mean by the term gas turbine and how are turbines classified? d) Describe briefly an axial-flow compressor. e) Differentiate between water tube and fire tube boilers?

3. Answer the following briefly. 5X3=15M

a) Define slip factor, pressure coefficient and steady flow compressor?

b) Write different applications of rockets?

c) With the help of neat diagram explain the working of Lamont boiler.

d) Classify nozzles? Analyze the effect of pressure ratio on the discharge from the nozzle with the help of a curve.

e) Analyze the diagram of velocity triangles of an impulse turbine.

PART-B Answer any FOUR questions 4X10=40M

4. The velocity of steam, leaving the nozzles of an impulse turbine, is 1000 m/s and the nozzle angle is 200. The blade velocity is 300 m/s

and the blade velocity coefficient is 0.70. Assuming no loss due to shock at inlet, calculate for a mass flow of 0.5 kg/s and symmetrical

blading

a) Blade inlet angle

b) Driving force on the wheel

c) Axial thrust on the wheel and

d) Power developed by the turbine.

5. a) Develop an expression for mass of steam discharged through nozzle.

b) Steam at a pressure of 10 bar and 2100C is supplied to a convergent divergent nozzle with a throat area of 1500 mm2. The

exit is below critical pressure. Find the coefficient of discharge, if the flow is 7200 kg of steam per hour.

6. a) Illustrate the working of a parallel flow jet condenser with the help of a neat sketch.

b) A surface condenser is designed to handle 10000 kg of steam per hour. The steam enters the condenser at 0.08 bar and

0.9 dryness and the condensate leaves at the corresponding saturation temperature. The pressure is constant throughout

the condenser. Estimate the cooling water flow rate per hour, if the cooling water temperature rise is limited to 100C.

7. a) What is centrifugal compressor? How does it differ from an axial flow compressor?

b) A multistage axial flow compressor delivers 18kg/s of air. The inlet stagnation condition is 1 bar and 20C. The power

consumed by the compressor is 4260kW. Calculate:

a) Delivery pressure

b) Number of stages

c) Overall isentropic rise in the first stage is 18C. The polytrophic efficiency of compression is 0.9 and the stage

stagnation pressure ratio is constant.

8. a) Describe with neat sketch the working of a simple constant pressure open cycle gas turbine and explain the methods

employed for improvement of thermal efficiency of open cycle gas turbine.

b) State the fundamental differences between the jet propulsions and rocket propulsions

9. a) Sketch and briefly explain any one of the boiler accessories.

b) Describe the functioning the Bension boiler with the help of a diagram.

****

VNR VIGNANA JYOTHI INSTIYUTE OF ENGINEERING AND TECHNOLOGY

BACHUPALLY, NIZAMPET (S.O), HYDERABAD – 500 090

LABORATORY EXECUTION PLAN: 2017-18

III B.Tech, I Sem, ME-2 L T/P/D C

0 3 2

Course Name: PRODUCTION TECHNOLOGY LAB Course Code: 5ME59

Names of the Faculty Members: Mr. M.S.Srinivasa Rao, Mr.K.Jaya Prakash


Number of Sessions per week per batch: Batch: 1 & 2 (3+3=6 lecture periods) per week

COURSE PREREQUISITES:

Metallurgy and Material Science, Production Technology

COURSE OBJECTIVES:


• Understand and evaluate casting techniques and sand properties.

• Understand different welding processes and their use.

• Understand different press working operations

• Understand about the processing of plastics.

COURSE OUTCOMES:

After completion of this course the student is able to

• Apply the knowledge involved in casting techniques..

• Decide the selection of various welding techniques applicable for different materials.

• Integrate the knowledge involved in press working operations.

• Analyze the techniques involved in processing of plastics.

VNR VJIET/ACADEMICS/2017/Formats/ II

DETAILED SYLLABUS:

10 Exercises to be performed from the following:

METAL CASTING:

1. Pattern Design and making - for one casting drawing.

2. Sand properties testing - Exercise -for strengths, and permeability – 2Exercise

3. Moulding, Melting and Casting - 1 Exercise

I. WELDING:

1. Arc Welding Lap and Butt Joint - 2 Exercises

2. Spot Welding - 1 Exercise

3. TIG Welding - 1 Exercise

4. MIG Welding - 1 Exercise

5. Brazing - 1 Exercise

II. MECHANICAL PRESS WORKING:

1. Blanking and Piercing operation s.

2. Bending operation

III. PROCESSING OF PLASTICS:

1. Injection Molding

2. Blow molding

LABORATORY EXECUTION PLAN

S. No. Topic Schedule Date Batch-I Schedule Date Batch-II

1 Introduction (Story Board, Lab Protocol) 03/7/17 05/07/17

2 Pattern Design and Mould Making

10/7/17 12/7/17

3 Sand Testing

17/7/17 19/7/17

4 Making of Lap Joint by Arc Welding

24/7/17 26/7/17

5 Making of Butt Joint by Arc Welding

31/7/17 02/8/17

6 Spot Welding

7/8/17 9/8/17

7 TIG Welding 14/8/17 16/8/17

8 Joining Dissimilar Metals by using Brazing 21/8/17 23/8/17

9 Blanking and Piercing Operation 28/8/17 30/8/17

10 Bending Operation by using Fly Press 04/09/17 06/09/17

11 Bending Operation by using Hydraulic Press 11/09/17 13/09/17

12 Blow Moulding 18/09/17 20/09/17

13 Injection Molding 25/09/17 27/09/17

14 Lab Projects Review 7/08/17 9/07/17





19 Pending Exercises for Absentees 16/10/17 18/10/17

20 Pending Exercises for Absentees 23/10/17 25/10/17

21 Performing Injection Molding of Plastics 30/10/17 01/11/17

22 Internal Lab Exam 06/11/17 08/11/17

Time Table

FORENOON SESSION AFTERNOON SESSION

Monday : -- Monday : 1:20 PM to 3:50 PM

Wednesday : 10:00 AM TO 12:30PM Wednesday : --

VNR VIGNANA JYOTHI INSTIYUTE OF ENGINEERING AND TECHNOLOGY

Bachupally, Nizampet (S.O), Hyderabad – 500 090

LABORATORY EXECUTION PLAN: 2017-18

III. B. Tech : I Sem : (Mechanical engineering -(ME-1) L T/P/D C

0 3 2

Course Name: Heat Transfer Laboratory Course Code: 5ME60

Names of the Faculty Members: K Krishna Murthy & Shiva Rama Krishna


Number of Sessions per week per batch: 1(3 lecture periods)

COURSE PREREQUISITES:

Heat and mass transfer, thermodynamics

COURSE OBJECTIVES:

• To analyze various modes of heat transfer experimentally.

• To measure heat transfer through conduction

• To measure heat transfer through natural and forced convection

• To measure heat transfer through radiation

COURSE OUTCOMES:

After completion of the course the student is able to:

• Identify and analyse the mode of heat transfer.

• Evaluate thermal conductivity of lagged pipe , metal bar and insulating powder

• Evaluate Heat transfer coefficient for natural and forced convection

VNR VJIET/ACADEMICS/2017/Formats/ II

• Evaluate emissivity of the given metal

DETAILED SYLLABUS:

Any 10 experiments to be conducted from the following:

1. Determination of Thermal Conductivity of given Metal Rod.

2. Determination of Stefan Boltzmann Constant.

3. To find out Critical Heat Flux

4. Determination of Overall Heat Transfer coefficient of Composite Wall.

5. Determination of thermal conductivity of Lagged Pipe.

6. Determination of Heat Transfer coefficient in Forced Convection Apparatus.

7. Determination of Heat Transfer coefficient in Natural Convection Apparatus.

8. Determination of Thermal Conductivity of Insulating Powder.

9. Determination of effectiveness of heat exchanger.

10. Measurement of Emissivity of given test plate .

11. Heat Transfer in Dropwise and Film Wise Condensation.

12. Determination of heat transfer coefficient and instantaneous heat transfer rate for Transient heat Conduction

LABORATORY EXECUTION PLAN

(Execution plan can be given including revision sessions and internal examination session)

S. No. Topic Schedule Date

Batch-I

Schedule Date

Batch-II

1 Introduction of lab and lab management and story board 06/07/17 04/07/17

2 Lab protocol 13/07/17 11/07/17

3

Metal rod, Stefan Boltzman, composite wall, lagged pipe,

forced convection, free convection, insulating power,

Emissivity and transient heat conduction experiments are

conducted

20/07/17 12/07/17

4 Metal rod, Stefan Boltzman, composite wall, lagged pipe,

forced convection, free convection, insulating power, 27/07/17 25/07/17


conducted

5




conducted

03/08/17 01/08/17

6




conducted

10/08/17 08/08/17

7




conducted

17/08/17 15/08/17

8




conducted

24/08/17 22/08/17

9




conducted

31/08/17 29/08/17

10




conducted

07/09/17 05/09/17

11




conducted

14/09/17 12/09/17

12




conducted

21/09/17 19/09/17

13




conducted

28/09/17 26/09/17

14 Metal rod, Stefan Boltzman, composite wall, lagged pipe,

forced convection, free convection, insulating power, 05/10/17 03/10/17


conducted

15




conducted

12/10/17 10/101/7

16 Heat exchanger 19/10/17 17/10/17

17 Heat exchanger

26/10/17 24/10/17

18 Internal Exam

02/11/17 31/11/17

19 Internal Exam - 07/11/17

Documents

ACADEMIC HAND BOOK 2017-2018 III B. TECH ME I SEMESTERvnrvjiet.ac.in/download/academicplans/III-1me.pdf · Number of working days: 90 Number of Hours/week: 3 Total number of periods