1 files changed, 34 insertions, 0 deletions
diff --git a/746/CH12/EX12.08/12_08.sce b/746/CH12/EX12.08/12_08.sce
new file mode 100755
index 000000000..cd86a9749
--- /dev/null
+++ b/746/CH12/EX12.08/12_08.sce
@@ -0,0 +1,34 @@
+//velocity and entropy//
+pathname=get_absolute_file_path('12.08.sce')
+filename=pathname+filesep()+'12.08-data.sci'
+exec(filename)
+//Density at section 1(in lbm/ft^3):
+d1=p1*144/R/T1
+//Velocity at section 2(in ft/sec):
+V2=(p1-p2)*144/d1/V1*32.2+V1
+//Density at section 2(in lbm/ft3):
+d2=d1*V1/V2
+//Temperature at section 2(in R):
+T2=p2/d2/R*144
+//Mach number at section 2:
+M2=V2/sqrt(k*R*32.16*T2)
+//Stagnation Temperature at section 2(in R):
+T02=T2*(1+(k-1)/2*M2^2)
+//Stagnation pressure at section 2 (in psia):
+p02=p2*(T02/T2)^(k/(k-1))
+//Mach Number at section 1:
+M1=V1/sqrt(k*R*32.16*T1)
+//Stagnation temperature at section 1(in R):
+T01=T1*(1+(k-1)/2*M1^2)
+//Energy added(in Btu/lbm):
+E=Cp*(T02-T01)
+//Change in entropy(in Btu/(lbm-R)):
+dS=Cp*log(T2/T1)-(Cp-Cv)*log(p2/p1)
+printf("\n\nRESULTS\n\n")
+printf("\n\nVelocity at section 2: %.3f ft/sec\n\n",V2)
+printf("\n\nDensity at section 2: %.3f lbm/ft^3\n\n",d2)
+printf("\n\nTemperature at section 2: %.3f R\n\n",T2)
+printf("\n\nStagnation Temperature at section 2: %.3f R\n\n",T02)
+printf("\n\nStagnation pressure at section 2: %.3f psia\n\n",p02)
+printf("\n\nEnergy added: %.3f Btu/lbm\n\n",E)
+printf("\n\nChange in entropy: %.3f Btu/(lbm-R)\n\n",dS)