blob: 6f64b20481ff7fc14bf4591b4bb6ddf1b04684f6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
////Chapter 13 Steam Engines
////Example 13.8 Page No 288
////Find Diagram factor
//Input data
clc;
clear;
P1=10; //Inlet pressure
Pb=1; //Back pressure
rc=3; //Expansion ratio
a=12.1; //Area of indicator diagram
b=7.5; //Length of indicator diagram
S=3; //Pressure scale
//Calculation
Pm=round((P1/rc)*(1+log(rc))-Pb ); //Therotical mean effective pressure Pm
Pma=a/b*S; //Actual mean effective pressure Pma
K=Pma/Pm; //Diagram factor
///Output
printf('Therotical mean effective pressure= %f bar \n',Pm);
printf('Actual mean effective pressure= %f bar \n',Pma);
printf('Diagram factor= %f \n',K);
|
