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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 /2090/CH16/EX16.6 | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '2090/CH16/EX16.6')
| -rwxr-xr-x | 2090/CH16/EX16.6/Chapter16_example6.sce | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/2090/CH16/EX16.6/Chapter16_example6.sce b/2090/CH16/EX16.6/Chapter16_example6.sce new file mode 100755 index 000000000..f4f27ea7a --- /dev/null +++ b/2090/CH16/EX16.6/Chapter16_example6.sce @@ -0,0 +1,41 @@ +clc
+clear
+//Input data
+n=8;//Number of cylinders
+d=0.08;//The diameter of the bore in m
+L=0.1;//The length of the stroke in m
+N=4500;//The speed of the engine in rpm
+dy=0.55;//The dynamometer readings in m
+w=40;//The weight of the dynamometer scale reading in kg
+c=100;//Fuel consumption in cc
+t=9.5;//Time taken for fuel consumption in s
+CV=44000;//The calorific value of the fuel in kJ/kg
+p=1;//The atmospheric air pressure in bar
+T=300;//The atmospheric air temperature in K
+pi=3.141;//Mathematical constant of pi
+ma=6;//Mass flow rate of air in kg/min
+g=0.7;//Specific gravity of the fuel
+Vc=65;//The clearance volume of each cylinder in cc
+R=287;//Real gas constant in J/kgK
+g=1.4;//Isentropic index
+
+//Calculations
+bp=(2*pi*N*dy*w*9.81)/(60*1000);//The brake power in kW
+bmep=[(bp*1000*60)/(L*(pi/4)*d^2*(N/2)*n)]/10^5;//The brake mean effective pressure in bar
+mf=(c*g*3600)/(t*2*1000);//The mass flow rate of fuel in kg/h
+bsfc=(mf/bp);//Brake specific fuel consumption in kg/kWh
+bsac=(ma*60)/bp;//Brake specific air consumption in kg/kWh
+a=bsac/bsfc;//Air fuel ratio
+nb=((bp*3600)/(mf*CV))*100;//The brake thermal efficiency in percent
+Va=(ma*R*T)/(p*10^5);//The volume flow rate of air at intake condition in m^3/min
+Vs=(pi/4)*d^2*L*(N/2)*n;//The swept volume per minute in m^3/min
+nv=(Va/Vs)*100;//Volumetric efficiency in percent
+Vs1=[(pi/4)*d^2*L]*10^6;//Swept volume per cylinder in cc
+cr=(Vs1+Vc)/Vc;//Compression ratio
+na=[1-(1/cr)^(g-1)]*100;//Air standard efficiency in percent
+re=[(nb)/(na)]*100;//Relative efficiency in percent
+
+//Output
+printf( 'The brake power = %3.1f kW \n The brake mean effective pressure = %3.3f bar \n The brake specific fuel consumption = %3.3f kg/kWh \n The brake specific air consumption = %3.2f kg/kWh \n The air fuel ratio = %3.2f \n The brake thermal efficiency = %3.1f percent \n The volumetric efficiency = %3.1f percent \n The relative efficiency = %3.1f percent ',bp,bmep,bsfc,bsac,a,nb,nv,re)
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