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+//Fluid system - By - Shiv Kumar

+//Chapter 2 - Impact of Jet

+//Example 2.24

+      clc

+     clear

+     

+//Given Data:-

+        Do=1.5;     //Diameter of rotor at inlet of vane, m

+        Di=1;       //Diameter of rotor at outlet of vane, m

+        N=400;       //Speed of the rotor, rpm

+        Vi=15;       //m/s

+        alpha_i=12;      //Nozzle angle at inlet, degrees

+        Vo=5;       //m/s

+        VFo=Vo;         

+//Data Used:-

+     g=9.81;          //Acceleration due to gravity, m/s^2

+

+//Computations:-

+        ui=%pi*Do*N/60;          //m/s

+        uo=%pi*Di*N/60;          //m/s

+        Vfi=Vi*sind(alpha_i);      //m/s

+        Vfo=Vo;     //m/s

+        Vwi=Vi*cosd(alpha_i);       //m/s

+   //(a)

+        Vrwi=ui-Vwi;           //m/s

+        beta_i=180-atand(Vfi/Vrwi);        //Blade angle at inlet, degrees

+        beta_o=atand(Vfo/uo);          //Blade angle at outlet, degrees

+    //(b)

+        Vro=uo/cosd(beta_o);          //m/s

+    //(c)

+        W=Vwi*ui/g;        //N-m/N

+

+//Results:-

+     printf("(a)Blade angle at entry and exit are:  \n\t")

+     printf("beta_i=%.2f degrees  \t beta_o=%.2f degrees \n\n", beta_i,beta_o)      //The answer vary due to round off error

+     printf("(b)Velocity of water relative to Vanes at exit, Vro=%.2f m/s  \n", Vro)      //The answer vary due to round off error

+     printf("(c)Work done per second per unit weight of water strikes on Vane per second=%.2f N-m/N", W)      //The answer vary due to round off error

+