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diff --git a/3751/CH7/EX7.12/Ex7_12.sce b/3751/CH7/EX7.12/Ex7_12.sce new file mode 100644 index 000000000..1583c0430 --- /dev/null +++ b/3751/CH7/EX7.12/Ex7_12.sce @@ -0,0 +1,34 @@ +//Fluid Systems- By Shiv Kumar +//Chapter 7- Performance of Water Turbine +//Example 7.12 +// To Find (a)The Speed ,Discharge and Power required for the Actual Pump (b) The Discharge of the model. + clc + clear + +//Given:- + Lr=5; //Scale Ratio + DpbyDm=Lr; + DmbyDp=1/DpbyDm; + //For Model + Pm=22; //Power Required, kW + Hm=7; //Head, m + Nm=410; //Speed, rpm + eta_m=1; //Assumption that efficiency of the model is 100% + //For Prototype + Hp=35; //Head, m + //Data Required:- + rho=1000; //Density of Water, Kg/m^3 + g=9.81; //Acceleration due to gravity, m/s^2 + +//Computations:- + Np=Nm*DmbyDp*(Hp/Hm)^(1/2); //rpm + Pp=Pm*(Np/Nm)^3*DpbyDm^5; //KW + Qm=Pm*1000*eta_m/(rho*g*Hm); //m^3/s + Qp=Qm*(Np/Nm)^2*DpbyDm^2; //m^3/s + +//Results:- + printf("(a)For the Actual Pump(Prototype):\n Speed, Np=%.2f rpm , \n Discharge, Qp=%.3f m^3/s and \n Power,Pp=%.2fKW\n",Np,Qp,Pp) //The Answer vary due to Round off Error(For Qp), The Answer Provided in the Textbook is Wrong (For Np and Pp). + + printf("(b)The Discharge of the Model, Qm=%.4f m^3/s",Qm) //The Answer vary due to Round off Error + + |