MODAL, THERMAL AND C OUPLED FIELD ANALYSIS FOR …€¦ · Swathi.G, Snigdha.M, Satya Sandeep.C, Shiva Prasad.U and Praveen.B 943 [email protected] for road works and other temporary

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International Journal of Civil Engineering and Technology (IJCIET)Volume 8, Issue 7, July 2017, pp.

Available online at http://http://www.iaeme.com/ijciet/issues.asp?JType=IJCIET&VType=8&IType=7

ISSN Print: 0976-6308 and ISSN Online: 0976

© IAEME Publication

MODAL, THERMAL AND C

ANALYSIS FOR COMPRES

Swathi.G, Snigdha.M

Assistant Professor, Department of Aeronautical Engineering,

Institute of Aeronautical

Assistant professor, Department of Aeronautical Engineering,

Marri Laxman

ABSTRACT

Compressors are the devices widely used in almost all the field

like Civil, Mechanical, and Electrical

the analysis of compressor blade using ANSYS

under the high operation working conditions.

compressor blade which was meshed and imported to ANSYS to do Modal, Structural

and thermal analysis.

Key words: Compressor blades

Cite this Article: Swathi.G, Snigdha.M, Satya Sandeep.C, Shiva Prasad.U and

Praveen.B, Modal, Thermal and Co

International Journal of Civil Engineering and

http://www.iaeme.com/IJCIET/issues.

1. INTRODUCTION

Pneumatic drills and hammers

painting of vehicles, performing sanding in auto body shops, the presence of the compressors

can be noticed almost in every field of engineering. They p

pneumatic material handling

cylinders that power positioners, clamps, air chucks, and air knives

required for operating automated machinery

used for liquid padding, carton stapling, appliance sanding, dry powder transporting and

fluidizing.[6]

Both reciprocating and rotary screw compressors can be used to power pneumatic tools,

such as the jackhammers and pneumatic drills often seen on construction sites. Oil

rotary screw compressors can be considerably quieter; however, they are designed for

continuous operation and are therefore unsuitable for use in situations where they will hav

long shutdown periods. This sort of compressor is best suited to workshops and factories,

where it will frequently be used

IJCIET/index.asp 942 [email protected]

International Journal of Civil Engineering and Technology (IJCIET) 2017, pp. 942–950, Article ID: IJCIET_08_07_101

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and ISSN Online: 0976-6316

Scopus Indexed

MODAL, THERMAL AND COUPLED FIELD

ANALYSIS FOR COMPRESSOR BLADES

Swathi.G, Snigdha.M, Satya Sandeep.C, Shiva Prasad.U

rofessor, Department of Aeronautical Engineering,

Institute of Aeronautical Engineering, Hyderabad, India

Praveen.B


Reddy Institute of Technology, Hyderabad, India

ompressors are the devices widely used in almost all the fields of engineering

and Electrical, Aeronautical etc. This study concentrates on

of compressor blade using ANSYS to analyze its deformation

the high operation working conditions. CATIA was used to design the


blades, Structural analysis, Thermal analysis, ANSYS

Swathi.G, Snigdha.M, Satya Sandeep.C, Shiva Prasad.U and

Modal, Thermal and Coupled Field Analysis for Compressor Blades

International Journal of Civil Engineering and Technology, 8(7), 2017, pp. 942

http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=8&IType=7

drills and hammers in the construction sites or pneumatic nail guns for roofing,


can be noticed almost in every field of engineering. They play a vital role in operating

material handling equipment. They increase the production

cylinders that power positioners, clamps, air chucks, and air knives.They are

perating automated machinery, finishing and packaging with pneumatic devices



jackhammers and pneumatic drills often seen on construction sites. Oil


continuous operation and are therefore unsuitable for use in situations where they will hav

shutdown periods. This sort of compressor is best suited to workshops and factories,

frequently be usedand can remain powered up.Most portable compressors used

[email protected]

http://www.iaeme.com/ijciet/issues.asp?JType=IJCIET&VType=8&IType=7

OUPLED FIELD

SOR BLADES

Prasad.U

rofessor, Department of Aeronautical Engineering,

d, India


Hyderabad, India

s of engineering

. This study concentrates on

to analyze its deformation it undergoes

CATIA was used to design the


ANSYS.

Swathi.G, Snigdha.M, Satya Sandeep.C, Shiva Prasad.U and

upled Field Analysis for Compressor Blades.

Technology, 8(7), 2017, pp. 942–950.

asp?JType=IJCIET&VType=8&IType=7

nail guns for roofing,


vital role in operating

They increase the production efficiency with air

They are building blocks

inishing and packaging with pneumatic devices



jackhammers and pneumatic drills often seen on construction sites. Oil-injected


continuous operation and are therefore unsuitable for use in situations where they will have

shutdown periods. This sort of compressor is best suited to workshops and factories,

and can remain powered up.Most portable compressors used

Swathi.G, Snigdha.M, Satya Sandeep.C, Shiva Prasad.U and Praveen.B

http://www.iaeme.com/IJCIET/index.asp 943 [email protected]

for road works and other temporary construction projects, therefore, tend to be reciprocating

compressors, whichcan operate efficiently after periods of not being used. When choosing a

compressor, it needs to make sure it can generate sufficient pressure for the job. The majority

of applications that require a compressor with a power of more than 30 horse power (hp) and

at pressures between 100 and 150-pound force per sq.Inch gauge (psi) use rotary screw

models.Reciprocating compressors tend to be preferred for jobs needing less than 30 hp and

can deliver a pressure of up to 175 psi. It is, however, possible to utilize double-acting units if

it requires a pressure of 250 psior higher. There is a growing market for rotary compressors in

the 10 to 30 hp range, though, with one advantage of this type of model that they are designed

to operate at cooler temperatures than their reciprocating counterparts of the same size.[7]

Figure 1 Portable compressor in construction site[8]

The robust design of the compressor blades enables the fluid passing through it to increase

its pressure. It is very much important to design a compressor blade and implement the plan to

get a final output without any deviation. Before going for the manufacturing,the design should

be validated. It should be testedwhether it can withstand those harsh operating conditions in

which it operates.

Meha Setiya and his team incorporated stress analysis of impeller blade of the load

compressor aircraft APU 131-9A using ANSYS 15. They performed both thermal and

structural analysis for different materials namely SS 310, INCOLOY 909, Timetal834 and Ti

6-2-4-6. They selected materials by strength at high speeds. Their results suggested that for

aparticular application of high-speed load compressor blade, induced structural stresses are

within permissible range throughout the blade only in case of Ti 6-2-4-6.[1]

R.D.Banpurkar

with his team performedStructural Analysis of Micro Compressor Blades in which they

investigated the Effect of different material,Titanium, aluminum at the various rotational

speed.[2]

R.Ramesh had investigated on Design and analysis of compressor blades by using

composite materials. In this study, compressor blade was modeledand analyzed by modern

engineering, and advanced methods, materials, and compressor system and their integration

into aircraft manufacture. He came out with a conclusion that smart compressorsgive more

path ways to increase the pressure by reducing the negative factors.[3]

P.V.Krishnakanth and his team had performed Structural & Thermal Analysis of Gas

Turbine Blade by Using F.E.M. Their project specifiedhow the program makes efficient use

of the ANSYS pre-processor to analyzethe complex turbine blade geometries and apply


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boundary conditions to examine steady state thermal & structural performance of the blade for

N 155,Hastelloy x &Inconel 625 materials.

the three from the report generated after analysis from which

D. S. Aziaka and team performed

Compressor for a 100 MWIndustrial Gas Turbine (IND100)

that a constant hub diameter annulus configuration with compressor

3.75 m, tip blade speed of 301 m/s, maximum blade centrifugal force stress of 170 MPa, with

major emphasis on industrial application for the structural component design selections.

2. BLADE DESIGN

Reasons behind developing the gi

blade design and assembled with the assembly

into the fixture. This design is done with utmost care and developed as per the 2

given in figure 2 and 3.

In CATIA concerning the provided drawings again we need to develop the sketch in

sketcher module first and then it is extruded in part modeling.

way that each component of the

different CATIA files and then assembled using assembly module.

the unfinished blade profile is provided

That blade component is to be machined gradually in a

final element. Here to reduce the material cost each blade profile consists of two similar rotor

blades mirrored opposite to each other.

3. ANALYSIS

The designed rotor blade is analyzed using software ANSYS where modal and thermal

analysis is done on the blade. The blade de


IJCIET/index.asp 944 [email protected]

conditions to examine steady state thermal & structural performance of the blade for

Inconel 625 materials. Finally, they stated the best-suited

from the report generated after analysis from which their results we

performedStructural and Conceptual Design Analysisof an Axial

Compressor for a 100 MWIndustrial Gas Turbine (IND100). Theirresult analysis concluded

a constant hub diameter annulus configuration with compressor overall axial length of


major emphasis on industrial application for the structural component design selections.

Reasons behind developing the given 2-D design in to a 3-D model are

blade design and assembled with the assembly of the fixture design to see that the blade fits

the fixture. This design is done with utmost care and developed as per the 2

the provided drawings again we need to develop the sketch in

sketcher module first and then it is extruded in part modeling. The designis done

theblade like head stock, blade profile is developed separately in

different CATIA files and then assembled using assembly module.As per the

is provided.

That blade component is to be machined gradually in a sequential manner to obtain the

reduce the material cost each blade profile consists of two similar rotor

blades mirrored opposite to each other.

`

Figure 2 Blade design specifications


on the blade. The blade developed in CATIA is importedinto


[email protected]

conditions to examine steady state thermal & structural performance of the blade for

suitedmaterial among

were reported.[4]

Structural and Conceptual Design Analysisof an Axial

result analysis concluded

overall axial length of


major emphasis on industrial application for the structural component design selections.[5]

for analysis of the

see that the blade fits

the fixture. This design is done with utmost care and developed as per the 2-D drawing is

the provided drawings again we need to develop the sketch in

esignis done in such a

developed separately in

As per the given drawings,

manner to obtain the

reduce the material cost each blade profile consists of two similar rotor


is importedinto ANSYS for



analysis. We need to convert the CATIA file into ‘cgs’ format and then import by the same

format into ANSYS.

3.1. Modal Analysis

Modal analysis is used to determine the natural frequencies and mode shapes of a continuous

structure. Given “suitable” initial conditions, the structure will vibrate at one of its natural

frequencies and the shape of the vibration will be a scalar multiple of a mode shape.Given

“arbitrary” initial conditions, the resulting vibration will be a superposition of mode shapes.

Before starting of the analysis, we import the blade from CATIA software.

We need to set the PREFERENCES to structural initially as done for the static analysis.

The element type is set to SOLID→ 10 NODE 42. Suitable material constants are given as per

the blade requirements. Meshing is done by setting the global size to 8.

Change the analysis type to Modal

Solution→ Analysis Type→ New Analysis→ Modal

We set the analysis option

Solution→ analysis option→ number of modes to expand→ 10

Solve the load set then ANSYS generates a subset result for each frequency and mode

shape.

List results summary

General Postprocessor→ List Results→ Summary

Read results for a subset General Postprocessor→ Read Results→ first set → Plot

deformed geometry→ General Postprocessor → Read Results → Next Set →Plot deformed

geometry.

Figure 3 Meshed figure of the blade

Figure 4 Modal Analysis of Blade at frequency 70.98 and DMX 0.01304






3.2. Thermal Analysis

A thermal analysis calculates the temperature distribution and related thermal quantities in a

system of the component. Typical thermal quantities are the temperature distribution, the

amount of heatlost or gained, Thermal gradient, Thermal fluxes

The basis of thermal analysis in ANSYS is a heat balance equation obtained from

theprinciple of conservation of energy. The ANSYS program handles all three primary modes

of heat transfer are Conduction, Convection, and Radiation. We specify convection as a

surface load on conducting solid elements or shell elements. We specify the convection film

and bulk fluid temperature at the surface; ANSYS then calculates the appropriate heat transfer

across the surface. If the film coefficient depends upon temperature, we specify a table of

temperatures and along with the corresponding values of film coefficient at each



temperature.We use the same inputs as used in the case of modal analysis but the preferences

are set to thermal, and the procedure is followed as per the desired requirements.

Additionally, we provide thermal conductivity and thermal expansion of the material

along with the convection values such as

Convection film value 200

Bulk fluid temperature 600◦C

One of the ends of the blade which are fixed to the drum or disk is made as zero

temperature, indicating that it is fixed at that end. Then solve for the values.

Figure 8 Thermal analysis of the compressor blade

3.3. Coupled Field Analysis

Some types of coupled-field analysis such as thermal-structural and magnetic-thermal

analysis can represent thermal combined with other phenomena. A coupled-field analysis can

use matrix-coupled ANSYS elements or sequential load-vector coupling between separate

simulations of each phenomenon. Here we use thermal-structural analysis to represent the

deformation of the blade due to these thermal effects. The process is as similar to that of static

analysis where the load applied will be on the side of highest temperature recorded side where

as all the other loads are already assigned while thermal analysis is done.



Figure 9 Blade before and after thermal deformation

Figure 10 Displacement vector sum

Table 1 Conditions for thermal analysis

Material Pure titanium (type 4)

Density 4.506 g/cm³

Thermal Conductivity 21.9 W/ (m-K)

Thermal expansion 8.6 µm/ (m-K)

Specific Heat 0.54 j/ g k

Rpm 11000 to 15000

4. RESULTS

Modal thermal and coupled field analysis on the turbine blade was done. The noted

observations are

4.1. Thermal Analysis

The blade has been analyzed using ANSYS, and the results give us that the blade can with

stand up to 601◦C and with a minute deflection of 0.11439.



4.2. Modal Analysis

The modal analysis gives us the frequency and mode shapes of the blade deformed with a

maximum frequency of 163.5 Hz while prone to subjected intervals of modal analysis.

Figure 11 Modal analysis results - Frequency vs. DMX

REFERENCES

[1] Meha Seiya, Dr. Beena D. Baloni, Dr. Salim A. Channiwala, “ Structural analysis of load

compressor blade of aircraft auxiliary power unit,” International journal of scientific &

engineering research, Volume 6, Issue 2, February-2015 596, ISSN 2229-5518.

[2] R.D Banpurkar, P.Katare, “ Structural analysis of micro compressor blades,” International

journal ofrecent and innovation trends in computing and communication, ISSN: 2321-

8169, Volume: 3 Issue: 8.

[3] R.Ramesh, “Design and analysis of compressor blade by using composite materials,

”International journal of innovative research in technology, science & engineering

(IJIRTSE), ISSN: 2395-5619, Vol– 1, Issue – 6. August 2015.

[4] P.V.Krishnakanth, G.Narasa Raju, R. D.V. Prasad, R. Saisrinu, “ Structural & Thermal

Analysis of Gas Turbine Blade by Using F.E.M,” International Journal of Scientific

Research Engineering & Technology (IJSRET) Volume 2 , Issue2 , pp 060-065 , May

2013,ISSN 2278 – 0882.

[5] D. S. Aziaka, E. O. Osigwe, B. T. Lebele, “Structural and Conceptual Design Analysisof

an Axial Compressor for a 100 MWIndustrial Gas Turbine (IND100)”, World Journal of

Mechanics, 2014, 4, 332-347, Published Online November 2014 in SciRes.

http://www.scirp.org/journal/wjm, http://dx.doi.org/10.4236/wjm.2014.411033.

[6] https://civilengineerblog.com/reciprocating-rotary-screw-compressors/.

[7] http://www.quincycompressor.com/applications-of-air-compressors/.



[8] https://www.google.co.in/search?q=compressors+in+construction&hl=en&site=webhp&s

ource=lnms&tbm=isch&sa=x&ved=0ahukewj21cuzzdvahwftrwkhaxtccgq_auibigb&biw=

1366&bih=658#imgdii=r5gy0w13h6wwkm:&imgrc=erhvpcyrsnnzbm.

[9] S.M. Swamy, V. Panndurangadu and J.M. Shamkumar. Effect of a Tip Clearance on the

Performance of a Low Speed Centrifugal Compressor. International Journal of

Mechanical Engineering and Technology, 8(1), 2017, pp. 178–188.

[10] Shiva Prasad U, A. Rathan Babu, Suresh Kumar R, CH. Satya Sandeep. Particulate Laden

Flow Simulation in Three Dimensional Axial Compressor Stage used in Aircraft Engine.

International Journal of Mechanical Engineering and Technology, 8(7), 2017, pp. 112 –

124.

Documents

MODAL, THERMAL AND C OUPLED FIELD ANALYSIS FOR …€¦ · Swathi.G, Snigdha.M, Satya Sandeep.C, Shiva Prasad.U and Praveen.B 943 [email protected] for road works and other temporary