blob: 690bd338e45ac59e8165020553c6d262c7db7811 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
clc
clear
//Input data
n=4//Number of cylinders
d=0.2//Bore in m
l=0.3//Stroke in m
N=300//Speed in r.p.m
af=5//Air to fuel ratio by volume. In textbook it is given as 4 which is wrong
nv=78//Volumetric efficiency in percent
CV=2200//Calorific value in kcal/cu.m at N.T.P
bth=23//Brake thermal efficiency in percent
//Calculations
Vs=((3.14/4)*d^2*l)//Swept volume in cu.m
c=((nv/100)*Vs)//Total charge per stroke in cu.m
Vg=((c/af)*N)//Volume of gas used per min in cu.m at N.T.P
q=(CV*Vg)//Heat supplied in kcal/min
BHP=((bth/100)*q)/(4500/427)//Brake horse power
//Output
printf('The volume of gas used per min is %3.3f cu.m at N.T.P \n B.H.P of engine is %3.1f',Vg,BHP)
|
