Determine pressure

Twix · May 8, 2009, 19:43

Hi, I need help I have to determine outlet or inlet pressure in coolant chanel in turbine vane. I have the fallowing parameters on inlet: diameter, Reynolds number, mass flow rate and avarage temperature. The fluid is air ideal gas. I need this to add bundary conditions in CFX. If somebody know how to do it, or what anoter condition i can set please help.

Thanks and regards.

ghorrocks · May 10, 2009, 21:45

Hi,

This is a pretty basic question - have you done the tutorial examples, especially the ones on turbomachinery which are supplied with CFX? They are the best place to start.

Glenn Horrocks

Twix · May 11, 2009, 19:22

Hi Glenn, and thanks for replying.

I know that it’s basic question but I’m new In cfd and it is my first project. I would like to set mass flow at inlet boundary conditions and static pressure at outlet but I cant calculate this pressure. In my work I use data from this experiment http://gltrs.grc.nasa.gov/reports/1983/CR-168015.pdf for Mark 2 profile.

If it possible give me some directions how to do this, or what other boundary conditions I can set, having only those data.

Regards

ghorrocks · May 11, 2009, 21:28

Hi,

As I said, the place to start is the CFX tutorials.

For incompressible flows the outlet pressure is usually set to zero and pressure is offset by that amount. I have not had time to look at your document at the moment so I can't give detailed comments.

Glenn Horrocks

Twix · May 12, 2009, 03:54

Hi,

Thanks for your advice and i start doing those tutorials.

Regards

May 8, 2009, 19:43	Determine pressure	#1
Twix Member Michal Join Date: Mar 2009 Posts: 38 Rep Power: 19	Hi, I need help I have to determine outlet or inlet pressure in coolant chanel in turbine vane. I have the fallowing parameters on inlet: diameter, Reynolds number, mass flow rate and avarage temperature. The fluid is air ideal gas. I need this to add bundary conditions in CFX. If somebody know how to do it, or what anoter condition i can set please help. Thanks and regards.

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May 10, 2009, 21:45		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,701 Rep Power: 143	Hi, This is a pretty basic question - have you done the tutorial examples, especially the ones on turbomachinery which are supplied with CFX? They are the best place to start. Glenn Horrocks

May 11, 2009, 19:22		#3
Twix Member Michal Join Date: Mar 2009 Posts: 38 Rep Power: 19	Hi Glenn, and thanks for replying. I know that it’s basic question but I’m new In cfd and it is my first project. I would like to set mass flow at inlet boundary conditions and static pressure at outlet but I cant calculate this pressure. In my work I use data from this experiment http://gltrs.grc.nasa.gov/reports/1983/CR-168015.pdf for Mark 2 profile. If it possible give me some directions how to do this, or what other boundary conditions I can set, having only those data. Regards

May 11, 2009, 21:28		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,701 Rep Power: 143	Hi, As I said, the place to start is the CFX tutorials. For incompressible flows the outlet pressure is usually set to zero and pressure is offset by that amount. I have not had time to look at your document at the moment so I can't give detailed comments. Glenn Horrocks

May 12, 2009, 03:54		#5
Twix Member Michal Join Date: Mar 2009 Posts: 38 Rep Power: 19	Hi, Thanks for your advice and i start doing those tutorials. Regards