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//Fluid Systems - By - Shiv Kumar
//Chapter 11- Centrifugal Pumps
//Example 11.11
//To Find Vane Angle at Outer periphery of Impeller.
clc
clear
//Given Data:-
Q=0.118; //discharge, m^3/s
N=1450; //Speed, rpm
Hm=25; //Manometric Head, m
Do=250; //Diameter of the Impeller at Outlet, mm
bo=50; //Width at Outlet, mm
eta_man=75/100; //Manometric Efficiency
//Data Used:-
g=9.81; //Acceleration due to gravity, m/s^2
//Computations:-
Do=Do/1000; //m
bo=bo/1000; //m
uo=%pi*Do*N/60; // Tangential velocity of Impeller at Outlet, m/s
Vwo=g*Hm/(uo*eta_man); //m/s
Vfo=Q/(%pi*Do*bo); //m/s
beta_o=atand(Vfo/(uo-Vwo)); //degrees
//Results:-
printf(" Vane Angle at Outlet, beta_o=%.2f Degrees \n ",beta_o) //The answer vary due to round off error
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