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diff --git a/3751/CH11/EX11.19/Ex11_19.sce b/3751/CH11/EX11.19/Ex11_19.sce new file mode 100644 index 000000000..90e4e142b --- /dev/null +++ b/3751/CH11/EX11.19/Ex11_19.sce @@ -0,0 +1,49 @@ +//Fluid Systems - By - Shiv Kumar +//Chapter 11- Centrifugal Pumps +//Example 11.19 +//To Find (a)Head generated and (b)Power consumed + + clc + clear + +//Given Data:- + n=2; //Number of Stages + Q=100; //Discharge, litres/s + N=1000; //Speed, rpm + Do=500; //Diameter of the Impeller at Outlet, mm + bo=25; //Width of Impeller at outlet, mm + beta_o=30; //degrees + Area_per=10; //Percentage of Total Area which is covered due to blade thickness + eta_o=78/100; //Overall Efficiency + eta_man=85/100; //Manometric Efficiency + + +//Data Used: - + rho=1000; //Density of water, kg/m^3 + g=9.81; //Acceleration due to gravity, m/s^2 + + +//Computations:- + Q=Q/1000; //m^3/s + Do=Do/1000; //m + bo=bo/1000; //m + A=%pi*Do*bo*(1-Area_per/100); //Actual Area of Flow, m^2 + + 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 + + //(a)Head generated, H_Tm + Hm=eta_man*Vwo*uo/g; //m + H_Tm=n*Hm; //m + + //(b) Power consumed, P + P=rho*Q*g*H_Tm/(eta_o*1000); //kW + + +//Results:- + printf("(a)Head Generated, H_Tm=%.2f m \n",H_Tm) //The answer vary due to round off error + printf(" (b)Power consumed, P =%.2f kW \n",P) //The answer vary due to round off error + + |