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+// Display mode

+mode(0);

+// Display warning for floating point exception

+ieee(1);

+clear;

+clc;

+disp("Turbomachinery Design and Theory,Rama S. R. Gorla and Aijaz A. Khan, Chapter 3, Example 19")

+disp("Hydraulic efficiency is")

+disp("etah = Power deleloped/Power available")

+disp(" =m(Cw1U1 - Cw2U)/rhogQH")

+disp("Since flow is radial at outlet, then Cw2 = 0 and m = rhoQ, therefore")

+disp("etah = Cw1U1/gH")

+g = 9.81;

+H= 5;

+U1 = 9.6;

+etah = 80;//%

+Cw1 = etah *g*H/(9.6*100)

+disp("Radial velocity Cr1 = 4m/s")

+Cr1 = 4;

+disp("tan(alpha1) = Cr1/Cw1 (from velocity triangle)")

+alpha1 = atan(Cr1/Cw1)*180/%pi

+disp("i.e., inlet guide vane angle alpha1 = 44.38")

+disp("tan(beta1) = Cr1/(Cw1 - U1 )")

+beta1 = 180+atan(Cr1/(Cw1-U1))*180/%pi

+disp("Runner speed is")

+N = 230;

+D1 = 60*U1/(%pi*N)

+disp("Overall efficiency")

+disp("etao = Power output/Power available")

+rho = 1000;

+Q = 130*1000/(0.72*rho*g*H)

+disp("But Q = pi*D1h1Cr1 (where h1 is the height of runner)")

+h1 = Q/(%pi*D1*Cr1)