Density of Air vs. Pressure

[shup0739]

Hello all,

It seems like Air data is a bit difficult to get a grab of. While I have been able to find a great deal of information on the change in desity due to changes in temperature I have been unsuccessfull in finding data on the Pressure vs. Density of Air.

can anyone suggest a reliable source out there that I may be able to get my hands on.

thank you,

sam

 

[israelkk]

http://webbook.nist.gov/chemistry/fluid/

 

[25362]

Perry VI- Tables 3-211 and 3-212.

 

[siretb]

Difficult to find air data? Anyway, unless pressure is very very high, density is proportional to absolute pressure, and inversely proportional to absolute temperature.

 

[IRstuff]

http://www.wahiduddin.net/calc/density_altitude.htm

TTFN

 

[sailoday28]

The Beattie-Bridgman equation relates Pressure, Temperature and density for a number of gases. Any reasonably good Thermodynamics text will have the equation.

 

[saxon]

Try Crane's, "Flow of Fluids Tech Paper,No.410" appendix A-10. Referenced to both temp. & press..

Hope this helps.
saxon

 

[katmar]

Sam,

There is a function in the free program called Uconeer that calculates air density as a function of temperature and pressure.

Download from

http://www.katmarsoftware.com

In the program click on the fan icon on the toolbar to call up the gas mass to volumetric flowrate converter. Select air as the gas, enter your temp and press and it gives the density. Accuracy should be fine for normal plant calculations.

regards
Harvey

 

[shup0739]

Cool...thank you all for your help. I have found that crane tech paper 410 is the best and most easiest resource.

sam