Thermodynamic Properties of high pressure gases

[0507476h]

Hi,

Anyone know where I can find thermodynamic properties of gases at high pressure? More specifically I need to find the kinematic viscosity or the absolute viscosity of air at around 300 degrees Kelvin and 330 bar.

Cheers

 

[minger]

It depends on what gas and who you talk to. All the major aerospace companies for example have their own version of air tables (for high temp/high pressure). They can vary quite significantly.

 

[Mech_Engineer]

http://webbook.nist.gov/chemistry/fluid/" should have the data you're after. Otherwise, a thermodynamic properties of air table at the local school library would have it too. You might even be able to find a table online if you search in google for "themodynamic properties of air."

 

[stewartcs]

Hi,

Anyone know where I can find thermodynamic properties of gases at high pressure? More specifically I need to find the kinematic viscosity or the absolute viscosity of air at around 300 degrees Kelvin and 330 bar.

Cheers

Air @ 300 K and 330 bar:

Kin. Viscosity = 0.00000090477 (ft²/s)

CS

 

[0507476h]

Air @ 300 K and 330 bar:

Kin. Viscosity = 0.00000090477 (ft²/s)

CS

Thank-you for this, could you tell me how you calculated/where you found this data? Just so I can do it for myself in future as I reckon I will have a range of other pressures and temps to calculate kinematic viscosity for in future.

Thanks

 

[stewartcs]

Thank-you for this, could you tell me how you calculated/where you found this data? Just so I can do it for myself in future as I reckon I will have a range of other pressures and temps to calculate kinematic viscosity for in future.

Thanks

NIST has a program called REFPROP 8.0 that gives this information. Check the link above from Mech_Engineer and they will probably have a link for it. It cost $200 for copy last time I checked.

CS

 

[bejanaria]

Hi
I used ASPEN to find the answer
At 300K and 330 bar
Dynamic Viscosity=0.0299 cp =2.99e-5 Pa.sec
Kinematic Viscosity=8.566e-8 m^2/sec