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diff --git a/3751/CH4/EX4.11/Ex4_11.sce b/3751/CH4/EX4.11/Ex4_11.sce new file mode 100644 index 000000000..3cc72e495 --- /dev/null +++ b/3751/CH4/EX4.11/Ex4_11.sce @@ -0,0 +1,57 @@ +//Fluid system - By - Shiv Kumar
+//Chapter 4 - Pelton Turbine (Impulse Turbine)
+//Example 4.11
+
+ clc
+ clear
+
+//Given Data:-
+ N=300; //Speed of runner, rpm
+ H=500; //Head, m
+ d=200; //Diameter of the Jet, mm
+ AoD=165; //Angle of Deflection, degrees
+ Vel_per=15; //percentage by which velocity is reduced
+ Cv=0.98; //Co-efficient of Velocity
+ Ku=0.46; //Speed ratio
+ Loss_per=3; //Percentage of Mechanical losses
+
+//Data Used:-
+ rho=1000; //Density of water, kg/m^3
+ g=9.81; //Acceleration due to gravity, m/s^2
+
+
+//Computations:-
+ d=d/1000; //m
+ beta_O=180-AoD; //degrees
+ Vro_by_Vri=1-Vel_per/100; //Vro/Vri
+ K=Vro_by_Vri;
+ Vi=Cv*sqrt(2*g*H); //m/s
+ Vwi=Vi;
+ ui=Ku*sqrt(2*g*H); //m/s
+ uo=ui;
+ u=ui;
+ Vri=Vi-ui; //m/s
+ Vro=K*Vri; //m/s
+ Vrwo=Vro*cosd(beta_O); //m/s
+ Vwo=uo-Vrwo; //m/s
+
+ //(a) Water power, WP
+ Q=(%pi/4)*d^2*Vi; //m^3.s
+ WP=rho*Q*g*H/1000; //kW
+
+ //(b)The Force on the bucket in the direction of Jet, F
+ F=rho*Q*(Vwi-Vwo)/1000; //kN
+
+ //(c)Shaft Power, SP
+ Pr=F*u; //Power developed by the Runner, W
+ SP=Pr-Loss_per/100*Pr; //kW
+
+ //(d)Overall Efficiency, eta_o
+ eta_o=SP/WP*100; //In percentage
+
+//Results:-
+ printf("(a) Water power, WP=%.2f kW \n",WP) //The answer provided in the Textbook is wrong
+ printf("(b)The Force on the bucket in the direction of Jet=%.3f kN \n", F) //The answer vary due to round off error
+ printf("(c)Shaft Power, SP=%.3f kW\n",SP) //The answer provided in the Textbook is wrong
+ printf("(d)Overall efficiency, eta_o=%.2f percent", eta_o) //The answer vary due to round off error
+
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