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diff --git a/3751/CH11/EX11.10/Ex11_10.sce b/3751/CH11/EX11.10/Ex11_10.sce new file mode 100644 index 000000000..435caed65 --- /dev/null +++ b/3751/CH11/EX11.10/Ex11_10.sce @@ -0,0 +1,58 @@ +//Fluid Systems - By - Shiv Kumar +//Chapter 11- Centrifugal Pumps +//Example 11.10 +//To Find (i)Manometric Head (ii)Manometric Efficiency (iii)Overall Efficiency of the Pump. + + clc + clear + +//Given Data:- + Do=480; //External Diameter of the Impeller, mm + Di=240; //Internal Diameter of the Impeller, mm + N=1000; //Speed, rpm + Q=0.0576; //Rate of Flow, m^3/s + Vfo=2.4; //Velocity of Flow, m/s + Vfi=Vfo; + Ds=180; //Diameter of Suction Pipe, mm + Dd=120; //Diameter of Delivery Pipe, mm + h_s=6.2; //Suction Head, m of water (abs) + h_d=30.2; //Delivery Head, m of water (abs) + P=35; //Power required to drive the pump, kW + beta_o=45; //Vane Angle at outlet, degrees + + +//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 + Di=Di/1000; //m + Ds=Ds/1000; //m + Dd=Dd/1000; //m + P=P*1000; //W + + //(i)Manometric Head, Hm + + As=(%pi/4)*Ds^2; //m^2 + Ad=(%pi/4)*Dd^2; //m^2 + Vd=Q/Ad; //m/s + Vs=Q/As; //m/s + Hm=(h_d+Vd^2/(2*g))-(h_s+Vs^2/(2*g)); //m + + + uo=%pi*Do*N/60; // Tangential velocity of Impeller at Outlet, m/s + Vwo=uo-Vfo/tand(beta_o); //m/s + + //(ii) Manometric Efficiency, eta_man + eta_man=g*Hm/(Vwo*uo)*100; //In Percentage + + //(iii) The Overall Efficiency of the Pump, eta_o + eta_o=rho*Q*g*Hm/P*100; //In percentage + +//Results:- + printf(" (i)Manometric Head, Hm =%.2f m \n ",Hm) + printf(" (ii) Manometric Efficiency, eta_man =%.2f Percent \n ",eta_man) //The answer vary due to round off error + printf(" (iii) The Overall Efficiency of the Pump, eta_o =%.2f Percent \n ",eta_o) //The answer vary due to round off error + + |