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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.