I have question about importing profile data

dunapkt · February 8, 2023, 00:16

Hi, I'm doing my simulation about combustor and turbine blade. After finishing combustor simulation, I export temperature profile data from combustor outlet and import it to turbine inlet condition. When I see the result of turbine blade simulation, inlet temperature profile seems bit different. As you can see, there is some kind of wave-pattern appears. Is it okay and can I ignore this?

In my attachment, image 1 is temperature profile that I export from combustor outlet and image 2 is the temperature profile after my turbine blade simulation.

image 1.jpg

image 2.jpg

ghorrocks · February 8, 2023, 04:44

This might be just a rendering artefact. Have a close look at the results and see if it is the simulation elements you can see there.

Or it might be an interpolation artefact, in this case you might want to see if you can improve the interpolation to remove this artefact.

Opaque · February 8, 2023, 07:37

Q: how different are the boundary meshes between the combustor outlet and the turbine inlet?

If they are not conformal, and the mesh density is not similar, you should probably map the exported profile in CFX-Pre before using it for an inlet boundary condition.

In CFX-Pre, go to Tools/Edit Profile Editor and map the exported profile to the boundary of interest, and use the new profile instead.

dunapkt · February 9, 2023, 00:36

Thanks Opaque. I think you are right. Boundary mesh between combustor outlet and turbine inlet is quite different.

But I have problem with mapping. When I set "Option" in Edit profile data to "Map to Mesh Region", I got an error. It says, "The profile must have face connectivity if the 'Map to Mesh Regions' option is selected".

How can I fix this error?? I tried to find face connectivity in exporting data, but I can't find.

Opaque · February 9, 2023, 06:01

Are you using CFD-Post?

Goto:
1 - File/Export/Export
2 - Type BC Profile
3 - Under Export Geometry Information there should be a Face Connectivity toggle.
4 - Complete details and press Save

dunapkt · February 9, 2023, 06:32

Ohh I see. I found it. I was confused. Thanks for help.

February 8, 2023, 00:16	I have question about importing profile data	#1
dunapkt New Member Join Date: Sep 2022 Posts: 17 Rep Power: 3	Hi, I'm doing my simulation about combustor and turbine blade. After finishing combustor simulation, I export temperature profile data from combustor outlet and import it to turbine inlet condition. When I see the result of turbine blade simulation, inlet temperature profile seems bit different. As you can see, there is some kind of wave-pattern appears. Is it okay and can I ignore this? In my attachment, image 1 is temperature profile that I export from combustor outlet and image 2 is the temperature profile after my turbine blade simulation. image 1.jpg image 2.jpg

February 8, 2023, 04:44		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,729 Rep Power: 143	This might be just a rendering artefact. Have a close look at the results and see if it is the simulation elements you can see there. Or it might be an interpolation artefact, in this case you might want to see if you can improve the interpolation to remove this artefact. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

February 8, 2023, 07:37		#3
Opaque Senior Member Join Date: Jun 2009 Posts: 1,815 Rep Power: 32	Q: how different are the boundary meshes between the combustor outlet and the turbine inlet? If they are not conformal, and the mesh density is not similar, you should probably map the exported profile in CFX-Pre before using it for an inlet boundary condition. In CFX-Pre, go to Tools/Edit Profile Editor and map the exported profile to the boundary of interest, and use the new profile instead. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

February 9, 2023, 06:01		#5
Opaque Senior Member Join Date: Jun 2009 Posts: 1,815 Rep Power: 32	Are you using CFD-Post? Goto: 1 - File/Export/Export 2 - Type BC Profile 3 - Under Export Geometry Information there should be a Face Connectivity toggle. 4 - Complete details and press Save __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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February 9, 2023, 00:36		#4
dunapkt New Member Join Date: Sep 2022 Posts: 17 Rep Power: 3	Thanks Opaque. I think you are right. Boundary mesh between combustor outlet and turbine inlet is quite different. But I have problem with mapping. When I set "Option" in Edit profile data to "Map to Mesh Region", I got an error. It says, "The profile must have face connectivity if the 'Map to Mesh Regions' option is selected". How can I fix this error?? I tried to find face connectivity in exporting data, but I can't find.

February 9, 2023, 06:32		#6
dunapkt New Member Join Date: Sep 2022 Posts: 17 Rep Power: 3	Ohh I see. I found it. I was confused. Thanks for help.