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//Fluid Systems - By - Shiv Kumar
//Chapter 11- Centrifugal Pumps
//Example 11.21
//To Find the Manometric Efficiency
clc
clear
//Given Data:-
n=4; //Number of Pumps
N=400; //Speed, rpm
H_Tm=40; //Total Manometric Head, m
Q=0.2; //Discharge, m^3/s
beta_o=40; //Vane Angle at Outlet, degrees
Do=600; //Diameter of the Impeller at Outlet, mm
bo=50; //Width of Impeller at outlet, mm
//Data Used: -
rho=1000; //Density of water, kg/m^3
g=9.81; //Acceleration due to gravity, m/s^2
//Computations:-
Do=Do/1000; //m
bo=bo/1000; //m
A=%pi*Do*bo; //Area of Flow, m^2
Hm=H_Tm/n; //Manometric Head of each Pump, m
uo=%pi*Do*N/60; //Tangential Velocity of Impeller at Outlet, m/s
Vfo=Q/A; //Velocity of Flow, m/s
Vfi= Vfo;
Vwo=uo-Vfo/tand(beta_o); //m/s
eta_man=g*Hm/(Vwo*uo)*100; //Manometric Efficiency in Percentage
//Results:-
printf("Manometric Efficiency, eta_man=%.2f Percent \n",eta_man) //The answer vary due to round off error
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