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//Fluid Systems - By - Shiv Kumar
//Chapter 11- Centrifugal Pumps
//Example 11.2
//To Find the Vane Angle at Outer Periphery of the Impeller.
clc
clear
//Given Data:-
N=1470; //Speed, rpm
Q=100; //Discharge, litres/s
Hm=24; //manometric Head, m
Do=240; // Diameter of Impeller at Outlet, mm
b_o=50; //Width of Impeller at Outlet, mm
eta_man=76/100; //Manometric EEfficiency
//Data Used:-
g=9.81; //Acceleration due to gravity, m/s^2
//Computations:-
Q=Q/1000; //m^3/s
Do=Do/1000; //m
b_o=b_o/1000; //m
uo=%pi*Do*N/60; //m/s
Vwo=g*Hm/(uo*eta_man); //m/s
Vfo=Q/(%pi*Do*b_o); //m/s
//From Outlet Velocity Triangle (OVT),
beta_o=atand(Vfo/(uo-Vwo)); //degrees
//Result:-
printf("The Vane Angle at Outer Periphery of Impeller, beta_o=%.2f Degrees \n",beta_o) //The answer vary due to round off error
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