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diff --git a/3751/CH11/EX11.21/Ex11_21.sce b/3751/CH11/EX11.21/Ex11_21.sce new file mode 100644 index 000000000..4421e1019 --- /dev/null +++ b/3751/CH11/EX11.21/Ex11_21.sce @@ -0,0 +1,40 @@ +//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 + + |