# Aerospace How to calculate compressed air temperature and pressure

1. Feb 23, 2009

### vincentryan

How to calculate compressed air temperature and pressure at combustion chamber inlet?

Small Example
I want to calculate compressed air temperature and pressure at combustion chamber inlet in single stage centrifugal compressor,
RPM = 10 000
Temperature and Pressure of the Air before compressed =30 and normal atmosphere pressure at ground level

2. Apr 11, 2009

### DuncanM

A professor at Virginia Tech has written and posted several tools for aerodynamics applications:

http://engapplets.aoe.vt.edu/" [Broken]

One of the tools is a Compressible Aerodynamics Calculator.

Perhaps there is something there that might help.

Last edited by a moderator: May 4, 2017
3. Apr 26, 2009

### jaap de vries

You need to know the pressure ratio and the efficiency of the compressor.

Note the 10 kRPM is not very high so your efficiency might not be that good.
Second, Make sure to put units behind your values so we know what you are talking about.

P01 = 101235 Pa ?
T01 = 303 K ?