diff options
| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3751/CH4/EX4.6/Ex4_6.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '3751/CH4/EX4.6/Ex4_6.sce')
| -rw-r--r-- | 3751/CH4/EX4.6/Ex4_6.sce | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/3751/CH4/EX4.6/Ex4_6.sce b/3751/CH4/EX4.6/Ex4_6.sce new file mode 100644 index 000000000..9664981c7 --- /dev/null +++ b/3751/CH4/EX4.6/Ex4_6.sce @@ -0,0 +1,57 @@ +//Fluid system - By - Shiv Kumar
+//Chapter 4 - Pelton Turbine (Impulse Turbine)
+//Example 4.6
+ clc
+ clear
+//Given Data:-
+ N=300; //Speed of runner, rpm
+ H=510; //Head, m
+ d=200; //Diameter of the Jet, mm
+ AoD=165; //Angle of Jet(Deflection inside bucket), degrees
+ Vel_per=15; //Percentage by which velocity is reduced due to friction
+ Loss_per=3; //Percentage of mechanical Losses (of power Supplied)
+
+//Data Used:-
+ rho=1000; //Density of water, kg/m^3
+ g=9.81; //Acceleration due to gravity, m/s^2
+ Cv=0.98; //Co-efficient of Velocity
+ Ku=0.46; //Speed ratio
+
+//Computations:-
+ d=d/1000; //m
+ beta_O=180-AoD; //degrees
+ Vro_by_Vri=1-Vel_per/100; //Vro/Vri
+ Vi=Cv*sqrt(2*g*H); //m/s
+ Vwi=Vi;
+ u=Ku*sqrt(2*g*H); //m/s
+ uo=u;
+ ui=u;
+ Vri=Vi-ui; //m/s
+ Vro=Vri*Vro_by_Vri; //m/s
+ Vrwo=Vro*cosd(beta_O); //m/s
+ Vwo=uo-Vrwo; //m/s
+ Q=(%pi/4)*d^2*Vi; //Discharge, m^3/s
+ //(i) Resultant Force on bucket, F
+ F=rho*Q*(Vwi-Vwo)/1000; //kN
+
+ //Result (i):-
+ printf("(i) Resultant Force on bucket, F=%.3f kN \n", F) //The answer vary due to round off error
+
+ //(ii) Shaft Power, P
+ Pr=F*u; //power developed by runner, kW
+ P=Pr-(Loss_per/100)*Pr; //kW
+
+ //Result (ii)
+ printf("(ii)Shaft Power, P=%.3f kW \n", P) //The answer given in the textbook is wrong (due to round off error in F)
+ //OR
+ eta_m=1-Loss_per/100; //Mechanical Efficiency
+ P=eta_m*Pr; //kW
+
+ //(iii) Overall Efficiency, eta_O
+ eta_O=P*1000/(rho*Q*g*H)*100; //In percentage
+ //Result (iii)
+ printf("(iii)Overall efficiency, eta_O=%.2f percent", eta_O)
+
+
+
+
|