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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)