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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 /2870/CH17/EX17.9/Ex17_9.sce | |
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| -rwxr-xr-x | 2870/CH17/EX17.9/Ex17_9.sce | 46 |
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diff --git a/2870/CH17/EX17.9/Ex17_9.sce b/2870/CH17/EX17.9/Ex17_9.sce new file mode 100755 index 000000000..28e3da2c2 --- /dev/null +++ b/2870/CH17/EX17.9/Ex17_9.sce @@ -0,0 +1,46 @@ +clc;clear;
+//Example 17.9
+
+//given data
+m=2.86;
+Ma1=2;
+P01=1;
+P1=0.1278;
+T1=444.5;
+p1=1.002;
+
+//from Table A-2a
+R=0.287;//in kJ/kg-K
+cp=1.005;//in kJ/kg-K
+k=1.4;
+
+//calculations
+
+//part - a
+//from Table A-33 at Ma1=2.0
+Ma2=0.5774;
+P0201=0.7209;//P02/P01
+P21=4.5;//P2/P1;
+T21=1.6875;//T2/T1
+p21=2.6667;//p2/p1
+P02=P0201*P01;
+P2=P21*P1;
+T2=T21*T1;
+p2=p21*p1;
+disp(P02,'the stagnation pressure in MPa');
+disp(P2,'the static pressure in MPa');
+disp(T2,'static temperature in K');
+disp(p2,'static density in kg/m^3');
+
+//part - b
+//s21 = s2 - s1
+s21=cp*log(T2/T1)-R*log(P2/P1);
+disp(s21,'the entropy change across the shock in kJ/kg-K');
+
+//part - c
+V2=Ma2*sqrt(k*R*T2*1000);//factor of 1000 to convert kJ to J
+V2=ceil(V2);
+disp(V2,'the exit velocity in m/s');
+
+//part - d
+disp('flow rate is not affected by presence of shock waves amd remains 2.86 kg/sec')
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