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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1775/CH4/EX4.22 | |
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| -rwxr-xr-x | 1775/CH4/EX4.22/Chapter4_Example22.sce | 40 |
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diff --git a/1775/CH4/EX4.22/Chapter4_Example22.sce b/1775/CH4/EX4.22/Chapter4_Example22.sce new file mode 100755 index 000000000..1273d8a87 --- /dev/null +++ b/1775/CH4/EX4.22/Chapter4_Example22.sce @@ -0,0 +1,40 @@ +//Chapter-4, Illustration 22, Page 212
+//Title: Steam Nozzles and Steam Turbines
+//=============================================================================
+clc
+clear
+
+//INPUT DATA
+N=300;//Speed in rpm
+m=4.28;//Mass of steam in kg/s
+P=1.9;//Pressure of steam in bar
+x=0.93;//Dryness fraction
+W=3.5;//Stage power in kW
+r=0.72;//Ratio of axial flow velocity to blade velocity
+a1=20;//Nozzle angle at inlet in degrees
+b2=a1;//Blade tip angle at inlet in degrees
+l=0.08;//Tip leakage steam
+vg=0.929;//Specific volume of steam from steam tables in (m^3)/kg
+
+//CALCULATIONS
+mact=m-(m*l);//Actual mass of steam in kg/s
+a=(3.147*N)/60;//Ratio of blade velocity to mean dia
+b=r*a;//Ratio of axial velocity to mean dia
+c=46;//Ratio of change in whirl velocity to mean dia
+D=sqrt((W*1000)/(mact*c*a));//Mean dia in m
+Ca=b*D;//Axial velocity in m/s
+h=((mact*x*vg)/(3.147*D*Ca))*1000;//Blade height in mm
+D1=D-(h/1000);//Drum dia in m
+
+//OUTPUT
+mprintf('Drum diameter is %3.3f m \n Blade height is %3.0f mm',D1,h)
+
+
+
+
+
+
+
+
+
+//==============================END OF PROGRAM=================================
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