Thermodynamic Properties of high pressure gases


by 0507476h
Tags: gases, pressure, properties, thermodynamic
0507476h
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#1
Oct28-09, 06:56 AM
P: 6
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
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minger
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#2
Oct28-09, 08:00 AM
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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
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#3
Oct28-09, 12:20 PM
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NIST Thermophysical Properties of Fluid Systems 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
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#4
Oct29-09, 02:27 PM
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Thermodynamic Properties of high pressure gases


Quote Quote by 0507476h View Post
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
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#5
Oct30-09, 04:39 AM
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Quote Quote by stewartcs View Post
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
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#6
Oct30-09, 07:52 AM
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Quote Quote by 0507476h View Post
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
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#7
Jul24-11, 06:39 AM
P: 1
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


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