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Diffstat (limited to '3751/CH2/EX2.25/Ex2_25.sce')
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diff --git a/3751/CH2/EX2.25/Ex2_25.sce b/3751/CH2/EX2.25/Ex2_25.sce new file mode 100644 index 000000000..58169444a --- /dev/null +++ b/3751/CH2/EX2.25/Ex2_25.sce @@ -0,0 +1,42 @@ +//Fluid system - By - Shiv Kumar
+//Chapter 2 - Impact of Jet
+//Example 2.25
+ clc
+ clear
+
+//Given Data:-
+ Vi=32; //Absolute velocity of Jet at inlet, m/s
+ N=250; //Speed of the wheel, rpm
+ alpha_i=20; //angle of Jet at inlet, degrees
+ Vo=6; //Absolute velocity of Jet at outlet, m/s
+ alpha=132; //Angle made by Jet at outlet with tangent to wheel, degrees
+ alpha_o=180-alpha; //degrees
+ Do=1.2; //outer Diameter of wheel, m
+ Di=0.75; //Inner diameter of wheel, m
+
+//Data Used:-
+ g=9.81; //Acceleration due to gravity, m/s^2
+
+//Computations:-
+ ui=%pi*Do*N/60; //m/s
+ uo=%pi*Di*N/60; //m/s
+ //(a)
+ Vfi=Vi*sind(alpha_i); //m/s
+ Vwi=Vi*cosd(alpha_i); //m/s
+ Vrwi=Vwi-ui; //m/s
+ Vwo=Vo*cosd(alpha_o); //m/s
+ Vrwo=uo+Vwo; //m/s
+ Vfo=Vo*sind(alpha_o); //m/s
+ beta_i=atand(Vfi/Vrwi); //degrees
+ beta_o=atand(Vfo/Vrwo); //degrees
+ //(b)
+ W=(Vwi*ui+Vwo*uo)/g; //N-m/N
+ //(c)
+ eta=2*(Vwi*ui+Vwo*uo)/Vi^2*100; //in percentage
+
+//Results:-
+ printf("(a)Vane angle at Inlet, beta_i=%.2f degrees \n", beta_i) //The answer vary due to round off error
+ printf(" Vane angle at Outlet, beta_o=%.2f degrees \n", beta_o) //The answer vary due to round off error
+ printf("(b)Work done per second per unit weight of water strikes on vane per second=%.2f N-m/N \n", W) //The answer vary due to round off error
+ printf("(c)Efficiency of the wheel, eta=%.2f percent",eta) //The answer vary due to round off error
+
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