blob: 483d22229f091ebe865893c80ba320a66c83b065 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
clc
clear
//Input data
Pm=7;//The mean effective pressure of a diesel cycle in bar
r=12;//The compression ratio
P1=1;//Initial pressure in bar
g=1.4;//Isentropic index
//Calculations
function[f] = F(x);//function definition
f = 45.4*x- 12*x^1.4 -64.2;
endfunction
x = 1;//Initial guss
function[z] = D(x)//Derivative
z= 3*x^2 - 3;
endfunction
y = fsolve(x,F, D);
C=y;//The cut off ratio
na=[1-(1/(r^(g-1)))*[((C^g)-1)/(g*(C-1))]]*100;//Air standard efficiency
//Output
printf('The cut off ratio = %3.1f \n The air standard efficiency = %3.2f percent ',C,na)
|
