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diff --git a/3751/CH11/EX11.17/Ex11_17.sce b/3751/CH11/EX11.17/Ex11_17.sce new file mode 100644 index 000000000..7380fdca4 --- /dev/null +++ b/3751/CH11/EX11.17/Ex11_17.sce @@ -0,0 +1,40 @@ +//Fluid Systems - By - Shiv Kumar +//Chapter 11- Centrifugal Pumps +//Example 11.17 +//To Find (a)Manometric Efficiency. (b)Minimum Starting Speed + + clc + clear + +//Given Data:- + Di=1200; //Inner Diameter of the Impeller, mm + Do=600; //Outer Diameter of the Impeller, mm + N=200; //Speed, rpm + Hm=6; //Manometric Head, m + beta_o=26; // Vane Angle at Outlet, degrees + Vfo=2.5; // Velocity of flow at Outlet, m/s + + +//Data Used: - + g=9.81; //Acceleration due to gravity, m/s^2 + + +//Computations:- + Di=Di/1000; //m + Do=Do/1000; //m + + uo=%pi*Di*N/60; //Tangential Velocity of Impeller at Outlet, m/s + Vwo=uo-Vfo/tand(beta_o); //m/s + + //(a)Manometric Efficiency, eta_man + eta_man=g*Hm/(Vwo*uo)*100; //In Percentage + + //(b) Minimum Starting Speed, Nmin + Nmin =sqrt(2*g*Hm*60^2/(%pi^2*(Di^2-Do^2))); //rpm + + +//Results:- + printf("(a)Manometric Efficiency =%.2f Percent \n",eta_man) //The answer vary due to round off error + printf(" (b)Minimum Starting Speed, Nmin =%.f rpm",Nmin) //The answer vary due to round off error + + |