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Diffstat (limited to '3751/CH4/EX4.12/Ex4_12.sce')
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diff --git a/3751/CH4/EX4.12/Ex4_12.sce b/3751/CH4/EX4.12/Ex4_12.sce new file mode 100644 index 000000000..fb6484d45 --- /dev/null +++ b/3751/CH4/EX4.12/Ex4_12.sce @@ -0,0 +1,51 @@ +//Fluid Systems - By - Shiv Kumar +//Chapter 4 - Pelton Turbine (Impulse Turbine) +//Example 4.12 + + clc + clear + +//Given Data:- + n=2; //Number of Jets + P=5000; //Shaft Power, HP + N=375; //Speed of Shaft, rpm + Hth=200; //Theoretical Head at Base of Nozzle, m + eta_p=90/100; //Efficiency of Power Transmission + D=1.65; //Diameter of the Runner, m + Vel_per=10; //Percentage by which velocity is decreased + Deflection=165; //Jet Deflection, degrees + eta_o=90/100; //Overall Efficiency + Cv=0.98; + + +//Data Used:- + rho=1000; //Density of water, kg/m^3 + g=9.81; //Acceleration due to gravity, m/s^2 + +//Computations:- + P=P*736; //W + Hact=eta_p*Hth; //Actual Head available at base of Nozzle, m + Vro_by_Vri=1-Vel_per/100; //Vro/Vri + beta_o=180-Deflection; //degrees + + u=%pi*D*N/60; //Velocity of Runner, m/s + ui=u; + uo=u; + Vi=Cv*sqrt(2*g*Hact); //m/s + Vwi=Vi; + Vri=Vi-u; //m/s + Vro=Vri*Vro_by_Vri; //m/s + Vrwo=Vro*cosd(beta_o); //m/s + Vwo=uo-Vrwo; //m/s + + //(a)Efficiency of Runner, eta_H + eta_H=2*(Vwi-Vwo)*u/Vi^2*100; //In Perecentage + + //(b)Diameter of each jet, d + Q=P/(rho*g*Hact*eta_o); //Discharge, m^3/s + d=sqrt(Q/((%pi/4)*n*Vi)); //Diameter of each Jet, m + +//Results:- + printf("(a)Efficiency of the Runner, eta_H=%.2f Percent\n",eta_H) //The answer vary due to round off error + printf("(b)Diameter of each Jet , d=%.3f m\n",d) + |