The rate of flow of water through the nozzle fitted at the end of the penstock is $2.0m^3/s $ The angle of deflection of jet is $165^\circ $. Determine the power given by the water to the runner and also hydraulic efficiency of the pelton wheel. Take speed ratio =0.45 and $C_v=1.0$

Mumbai University > Electronics and telecommunication > Sem 7 > Applied Hydraulics

Marks: 05

Years: DEC 2015

Given

Gross head $Hg=500m$

Head lost in friction $hf=\dfrac {Hg}3 =\dfrac {500}3 =166.7m $

$\therefore $ Net head $H=Hg-hf=500-166.7=333.30 m$

Discharge $Q=2.0 m^3/s $

Angle of Deflection $=165^\circ $

$\therefore $ Angle $\phi=180^circ -165^\circ =15^\circ$

Speed ratio = $0.45$

Coefficient of velocity $C_v=1.0$

Velocity of jet $V_1= C_v \sqrt{2gH} \\ …