CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   Main CFD Forum (http://www.cfd-online.com/Forums/main/)
-   -   Properties of air versus temperature AND pressure (http://www.cfd-online.com/Forums/main/15472-properties-air-versus-temperature-pressure.html)

Vincent July 25, 2008 05:39

Properties of air versus temperature AND pressure
 
Hi,

I'm working with air at high temperature (up to 2573 K) and high pressure (up to 60 bar) and I need ALL the physical properties of dry air versus temperature AND pressure.

for example, on this website http://www.pipeflowcalculations.com/tables/dryair.htm , there is three physical properties of air at different temperature and pressure. But it's too limited : not enough properties, very few pressure and temperature, no reference concerning the information displayed.

I had a look on several website like : http://tpsx.arc.nasa.gov/ , http://webbook.nist.gov/ , http://www.engineeringtoolbox.com/ but I didn't find what I need. Most of the time, properties are given versus temperature only.

Do you know where I could find such information ? There is an International Association for the Properties of Water and Steam (http://www.iapws.org/). Is there the equivalent association for the properties of air where I could find an answer ?

Thanks for your help.

Fernando Herrera July 25, 2008 06:04

Re: Properties of air versus temperature AND press
 
Have you tried using critical values of the air to extrapolate the known values of the properties.

Check any book in thermodynamics, there are some relationships there.

You could also have a look at Perry's handbook for chemical engineers

Vincent July 25, 2008 08:16

Re: Properties of air versus temperature AND press
 
No, I didn't try because, I prefer using well known correlations based on precise experimental results. For example, I took the data stored in the NIST website for water and steam because I think the level of confidence is high. And it's what I'm looking for : a sort of standard dry air model like the one which exists for earth's atmosphere ( http://www.pdas.com/atmos.htm ).

Of course, I could find some data in books but it would be much easier to have numerical data or a correlation. I want to avoid (if it's possible) to fill hundred of line and column myself ;-)

I found a lot of tools for steam and water on web. I can't believe there is no reference data for dry air...

Thanks for your help. Anything else ?


otd July 25, 2008 10:49

Re: Properties of air versus temperature AND press
 
Two possibilities - if you can locate them:

National Advisory Committee for Aeronautics, report 1135, Equations, Tables, and Charts for Compressible Flow, 1953.

NACA is the predecessor agency to NASA.

The other is:

Keenan and Kaye, Gas Tables, copyright by the authors in 1945 & 1948, published by Wiley.

Table 60 is entitled "Standard Atmosphere".

An extensive section entitled "Sources and Methods" gives equations and references to the fundamental data sources in the technical literature.

You might need to do some additional work (if you can find the references), but it appears to be a good place to start.

Good luck!

Vincent July 28, 2008 06:34

Properties of air versus temperature AND pressure
 
I have found the NACA report but I don't have the second reference you've mentioned.

As I said previously, I want to avoid (if it's possible) to fill hundred of line and column by myself. That's why, correlation or numeric array (on Excel for example) will be great.

I worked hard this week-end to find such resource on the web : nothing !!!

Any suggestions ?

Markus Lummer July 28, 2008 07:28

Re: Properties of air versus temperature AND press
 
Hi Vincent,

perhaps you should have a look at

http://www.mhprofessional.com/produc...sbn=0070116822

Hope, this helps.

Regards, Markus


All times are GMT -4. The time now is 01:45.