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Diffstat (limited to '3751/CH11/EX11.7/Ex11_7.sce')
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diff --git a/3751/CH11/EX11.7/Ex11_7.sce b/3751/CH11/EX11.7/Ex11_7.sce new file mode 100644 index 000000000..f1e0d183f --- /dev/null +++ b/3751/CH11/EX11.7/Ex11_7.sce @@ -0,0 +1,44 @@ +//Fluid Systems - By - Shiv Kumar +//Chapter 11- Centrifugal Pumps +//Example 11.7 +//To Determine the Impeller Speed and Torque produced by it. + + clc + clear + +//Given Data:- + Q=60; //Discharge, litres/s + Ri=75; //Radius of the Impeller at Inlet, mm + Ro=150; //Radius of the Impeller at Outlet, cm + beta_o=30; //Vane Angle at Outlet, degrees + beta_i=30; //Vane Angle at Inlet, degrees + Ai=0.025; //Impeller Area at Inlet, m^2 + + +//Data Used:- + rho=1000; //Density of water, kg/m^3 + + +//Computations:- + Q=Q/1000; //m^3/s + Ri=Ri/1000; //m + Ro=Ro/1000; //m + + Di=2*Ri; //m + Do=2*Ro; //m + Vfi=Q/Ai; //m/s + Vfo=Vfi; + ui=Vfi/tand(beta_i); //m/s + N=ui*60/(%pi*Di); //rpm + + uo=%pi*Do*N/60; //m/s + Vrwo=Vfo/tand(beta_o); //m/s + Vwo=uo-Vrwo; //m/s + P=rho*Q*Vwo*uo; //Impeller Power, W + Ti=P*60/(2*%pi*N); //Impeller Torque, N-m + +//Results:- + printf("Impeller Speed, N=%.2f rpm\n",N) //The answer vary due to round off error + printf("Impeller Torque, Ti=%.2f N-m\n",Ti) //The answer vary due to round off error + + |