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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /689/CH15/EX15.1 | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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initial commit / add all books
Diffstat (limited to '689/CH15/EX15.1')
| -rw-r--r-- | 689/CH15/EX15.1/1.sce | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/689/CH15/EX15.1/1.sce b/689/CH15/EX15.1/1.sce new file mode 100644 index 000000000..cd43d9e3f --- /dev/null +++ b/689/CH15/EX15.1/1.sce @@ -0,0 +1,20 @@ +clc; funcprot(0);
+//Example 15.1 Thrust and power coefficients
+
+// Initialisation of variables
+P = 500*550; // Power in ft-lb/sec
+V = 180*1.467; // Velocity in ft/sec
+n = 1900/60; // Rotaion per second
+D = 9; // Diameter in ft
+rho = 0.001756;
+
+
+// Calculations
+Cp = P/(rho*n^3*D^5);
+V_By_nD = V/(n*D);
+Ct = 0.074; // For corrosponding Cp and V/nD from figure 15.3.3
+T = Ct*rho*n^2*D^4;
+Eff = Ct*V_By_nD/Cp;
+
+//Results
+disp(Eff*100,"Propeller Efficiency (%) : ",T,"Thrust (lb) :") ;
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