1 files changed, 30 insertions, 0 deletions
diff --git a/1472/CH17/EX17.2/17_2.sce b/1472/CH17/EX17.2/17_2.sce
new file mode 100755
index 000000000..157b802b2
--- /dev/null
+++ b/1472/CH17/EX17.2/17_2.sce
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+clc
+//initialization of varaibles
+k=1.3
+P=250 //psia
+h0=1263.4 //B/lb
+w=10000
+cv=0.949
+vts=3.415 //cu ft/lb
+//calculations
+Pratio=(2/(k+1))^(k/(k-1))
+Pt=Pratio*P
+hts=1208.2 //B/lb
+h2s=891 //B/lb
+Vts=sqrt(2*32.2*778*(h0-hts))
+w=w/3600 //lb/sec
+at=w*vts/(Vts)
+V2=cv*sqrt(2*32.2*778*(h0-h2s))
+etan=cv^2
+h2=928 //B/lb
+disp("From table 3,")
+v2=276 //cu ft/lb
+a2=w*v2/V2
+a2s=0.17 //ft^2
+Cw=0.98
+at2=at/Cw
+//results
+printf("\n Throat area = %.5f ft^2",at)
+printf("\n Exit area = %.3f ft^2",a2)
+printf("\n For frictionless nozzle = %.3f ft^2",a2s)
+printf("\n Changed throat area = %.5f ft^2 and exit area is unchanged",at2)