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diff --git a/548/DEPENDENCIES/9_01data.sci b/548/DEPENDENCIES/9_01data.sci new file mode 100755 index 000000000..72941f043 --- /dev/null +++ b/548/DEPENDENCIES/9_01data.sci @@ -0,0 +1,20 @@ +//consider a six cylinder internal combustion engine.
+y=1.4;//specific heat ratio for air
+Stroke=9.5;//stroke (cm)of the internal combustion engine
+b=9;//bore(cm)of the internal combustion engine
+P2=0.8*1.01*10^5;//pressure (N/m^2)before compression stroke
+T2=250;//temperature(k) before compression stroke
+//V2 and V3 are volume before and after compression stroke respectively and V4 and V5 volume before and after power stroke respectively.
+r=10;//compression ratio(V2/V3)
+f=0.06;//fuel to air ratio by mass
+P3=P2*r^y //pressure after compression stroke(isentropic condition)
+T3=T2*r^(y-1)//temperature after compression stroke
+//chemical energy released in 1 Kg gasoline is 4.29*10^7 Joule so,heat released per Kg of fuel air mixture q equals:
+q=4.29*10^7*0.06/1.06
+Cv=720;//specific heat ratio(J/Kg-K)at constant volume for air
+T4=q/Cv+T3 //temperature before power stroke
+P4=P3*T4/T3 //pressure before power stroke
+P5=P4*(1/r)^y //pressure after power stroke from isentropic relation
+n=0.83;//propeller efficiency
+nm=0.75;//mechanical efficiency
+rpm=3000;//rotation per minute for the engine
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