ASSIGNMENT

HARAMAYA UNIVERSITY INSTITUTE OF TECHNOLOGY

Subject: Turbo Machine C!a: Mechanica! "IIIYEAR#

$% &ra' an( e)*!ain co+*!ete!, La,out o- H,(roe!ectric *o'er *!ant

.% In a in/!e ta/e i+*u!e turbine the ientro*ic entha!*, (ro* o- 011 2342/

occur in the no55!e ha6in/ e--icienc, o- 789 an( no55!e an/!e o- $8% The

b!a(e 6e!ocit, coe--icient i 1%78 an( ratio o- b!a(e *ee( to tea+ 6e!ocit, i

1%;<% The tea+ +a -!o' rate i $8 2/4 an( 6e!ocit, o- tea+ enterin/ i

=1 +4% &eter+ine

"a# The b!a(e an/!e at in!et an( out!et i- the tea+ enter b!a(e +ooth!, an(

!ea6e a)ia!!,%

"b# The b!a(e e--icienc,

"c# The *o'er (e6e!o*e( in 2>

"(# The a)ia! thrut%

So!6e uin/ co+bine( 6e!ocit, (ia/ra+%

0% A Centri-u/a! *u+* runnin/ at =11r*+?i 'or2in/ a/aint a tota! hea( o-

$8%;+%The e)terna! (ia+eter o- the i+*e!!er i <81c+ an( out !et 'i(th@c+%i-

the 6ane an/!e at out!et i 081 an( +ano+etric e--icienc, i @;9?(eter+ine

i#F!o' 6e!ocit, ii#Abo!ute 6e!ocit, o- 'ater !ea6in/ the 6ane iii#An/!e +a(e

b, the abo!ute 6e!ocit, at out!et o- 'ith the (irection o- +otion at out!et

i6#Rate o- -!o' throu/h the *u+*%

;% A &oub!e actin/ reci*rocatin/ *u+*? runnin/ at =1RM (e!i6er

1%11=.=+04 o- 'ater% The (ia+eter o- *iton i 01c+ an( tro2e !en/th

;1++%the uction an( (e!i6er, hea( are ;+ an( $.+ re*ecti6e!,% &eter+ine

i# Theoretica! (ichar/e ii# CoBe--icient o- (ichar/e

iii# 9 o- !i* i6# *o'er reuire( to run the *u+*

<% E)*!ain co+*!ete!, centri-u/a! *u+* 'ith neat 2etch%

 

  UNIT V (STEAM TURBINES)

1. A single stage of simple impulse turbine produces 120 kW at blade speed of 150 m/s when

steam mass flow rate is 3 kg/s. Steam enters moing blade at 350 m/s and leaes the stagea!iall". #onsidering elocit" coefficient of 0.$ and smooth steam entr" without shock into

 blades% determine the no&&le angle

and blade angles. Sole using elocit" diagram.

2. 'n a single stage simple impulse turbine the steam flows at rate of 5 kg/s. 't has rotor of 1.2 m

(iameter running at 3000 rpm. )o&&le angle is 1*+% blade speed ratio is 0.,% elocit" coefficientis 0.$% and outlet angle of blade is 3+ less than inlet angle. (etermine blade angles and power

deeloped.

3.'n a single stage impulse turbine the isentropic enthalp" drop of 200 k-/kg occurs in the no&&le

haing efficienc" of $ and no&&le angle of 15+. he blade elocit" coefficient is 0.$ and ratio

of blade speed to steam elocit" is 0.5. he steam mass flow rate is 20 kg/s and elocit" of steamentering is 50 m/s. (etermine

a the blade angles at inlet and outlet if the steam enters blades smoothl" and leaes a!iall".

b the blade efficienc"c the power deeloped in kW

d the a!ial thrust.

Sole using elocit" diagram.

,.'n a arson4s reaction turbine the rotor of 1m diameter runs at 3000 rpm. (etermine

the isentropic enthalp" drop in the stage considering stage efficienc" of 0.*0 % 6 0.7% blade

outlet angle 6 20+.

 

1.A 'mpeller of a centrifugal pump has an e!ternal diameter 5cm and internal

diameter of 30cm and it runs at 1550rpm. Assuming a constant flow elocit"

through impeller at 300cm/s and that the anes at setback at angle of 20 0 

(etermine 'nlet 8ane angle ii he angle makes with absolute elocit" of water at

e!it iii ane 9ut let whirl elocit" at e!it of ane

i he work done/)ewton of centrifugal pump

(raw elocit" triangle of centrifugal pump ane.