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+//Fluid System By Shiv Kumar
+//Chapter 6 - Kaplan and Propeller Turbines
+//Example 6.5
+//To Find (a)Guide Vane Angle at Inlet  (b)Runner Vane Angle at Inlet 
+
+clc
+clear
+
+//Given:
+   P=22500 //Shaft Power, KW
+   H=20;   //Head, m
+   N=148;   //Speed, rpm 
+   eta_H=95/100;  //Hydraulic Efficiency 
+   eta_o=89/100;  //Overall Efficiency 
+   D=4.5;    //Diameter of Runner, m
+   d=2;    //Diameter of Hub, m
+   Beta_o=34   //Runner Vane Angle at Outlet, Degrees   
+      
+//Data Required:
+   rho=1000;   //Density of Water, Kg/m^3
+   g=9.81;     //Acceleration due to gravity, m/s^2
+
+//Computations
+
+   u=%pi*D*N/60;     //Velocity of runner, m/s
+   Q=P*10^3/(rho*g*H*eta_o);   //Discharge, m^3/s 
+        Vfi=Q/((%pi/4)*(D^2-d^2));     // m/s
+  //As Velocity of Flow is Constant
+          ui=u;
+          uo=u;
+        Vfo=Vfi;
+        Vf=Vfo;
+    Vrwo=Vfo/tand(Beta_o);    //m/s
+    Vwo=uo-Vrwo;
+         Vo=sqrt(Vfo^2+Vwo^2);      //m/s
+        Vwi=(g*H-Vo^2/2)/u+Vwo ;    //m/s
+//(a)Guide Vane Angle at Inlet,Alpha_i
+     Alpha_i=atand(Vfi/Vwi);     //Degrees
+//(b)Runner Vane Angle at Inlet,Beta_i
+      Beta_i=180-atand(Vfi/(ui-Vwi));   //Degrees
+
+//Results
+        printf("(a)Guide Vane Angle at Inlet, Alpha_i=%.2f Degrees\n",Alpha_i)    //The answer vary due to round off error
+       printf("(b)Runner Vane Angle at Inlet, Beta_i =%.f Degrees\n",Beta_i)    //The answer provided in the textbook is wrong
+