diff options
Diffstat (limited to '3751/CH2/EX2.35/Ex2_35.sce')
| -rw-r--r-- | 3751/CH2/EX2.35/Ex2_35.sce | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/3751/CH2/EX2.35/Ex2_35.sce b/3751/CH2/EX2.35/Ex2_35.sce new file mode 100644 index 000000000..bc8783746 --- /dev/null +++ b/3751/CH2/EX2.35/Ex2_35.sce @@ -0,0 +1,38 @@ +//Fluid system - By - Shiv Kumar
+//Chapter 2 - Impact of Jet
+//Example 2.35
+ clc
+ clear
+
+//Given Data:-
+ Vr=14; //Relative Velocity of ship, m/s
+ a=0.025; //cross-sectional area of Jet, m^2
+ u=32; //Speed of ship, km/hr
+ eta_P=80/100; //Efficiency of pump
+ h_f=2.5; //Frictional Losses, m of water
+
+//Data Used:-
+ rho=1000; //Density of water, kg/m^3
+ g=9.81; //Acceleration due to gravity, m/s^2
+
+//Computations:-
+ u=u*1000/3600; //m/s
+ //(i)
+ //(a)
+ V=Vr-u; //m/s
+ F=rho*V*a*(V+u); //N
+ //(b)
+ W=F*u; //N-m/s, Value in textbook is wrong due to incorrect value of u ia used.
+ //(ii)
+ E=rho*a*Vr*((Vr^2-u^2)/2+g*h_f); //Actual energy supplied to water per second, N-m/s
+ OE_P=E; //Output fluid energy per second of pump
+ //(a)
+ P=OE_P/eta_P; //Power required to drive the pump, W
+ //(b)
+ eta_o=W/P*100; //In percentage
+
+//Results:-
+ printf("(i) (a)Resistance to the motion of ship, F=%.f N \n", F) //The answer provided in the textbook is wrong
+ printf(" (b)Propulsive work per second=%.2f N-m/s \n\n", W) //The answer provided in the textbook is wrong
+ printf("(ii) (a)Power required to drive the pump=%.2f W \n", P) //The answer provided in the textbook is wrong
+ printf(" (b)Overall Efficiency of propulsion, eta_o=%.2f percent", eta_o) //The answer vary due to round off error
|