how to find property for compressible flow

jai · August 1, 2009, 16:24

as of now i assumed that my flow is incompressible and ran the problem.
I'm simulating turbo machine problem.
i would like to simulate compressible(real) model in my problem.

I'm simulating turbine problem. so pressure, temperature and density at inlet to outlet vary. i know the pressure and temperature at in & outlet. using some general relationship i could find the density at in & outlet.

how do i find the varying property(density) of fluid through out the domain?

In cfx solver we are giving property of fluid with respect to standard temperature (ex:25°C).
if my problem is about 500°c means solver may automatically calculate the property for this temperature?
if it won't means how or where do i get it?

ghorrocks · August 2, 2009, 18:54

Sounds like you should look at the tutorial titled "Flow in an axial rotor-stator". This will show how this sort of simulation should be set up. While you are reading have a look in the best practices guide for turbomachinery, also in the documentation.

Glenn Horrocks

bharath · August 3, 2009, 21:09

Hi,
you have to use CEL function to vary the fluid property.think first is it needed for your problem?

August 1, 2009, 16:24	how to find property for compressible flow	#1
jai Member jaikrishna Join Date: Mar 2009 Location: chennai Posts: 56 Rep Power: 17	as of now i assumed that my flow is incompressible and ran the problem. I'm simulating turbo machine problem. i would like to simulate compressible(real) model in my problem. I'm simulating turbine problem. so pressure, temperature and density at inlet to outlet vary. i know the pressure and temperature at in & outlet. using some general relationship i could find the density at in & outlet. how do i find the varying property(density) of fluid through out the domain? In cfx solver we are giving property of fluid with respect to standard temperature (ex:25°C). if my problem is about 500°c means solver may automatically calculate the property for this temperature? if it won't means how or where do i get it?

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August 2, 2009, 18:54		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Sounds like you should look at the tutorial titled "Flow in an axial rotor-stator". This will show how this sort of simulation should be set up. While you are reading have a look in the best practices guide for turbomachinery, also in the documentation. Glenn Horrocks

August 3, 2009, 21:09		#3
bharath Senior Member Bharath kumar Join Date: Apr 2009 Posts: 169 Rep Power: 17	Hi, you have to use CEL function to vary the fluid property.think first is it needed for your problem?