Reduced pressure rise in numerical simulation

Julian121 · July 9, 2019, 13:14

I am modelling a 1.5 compressor stage.

I have experimental data at inlet to bell-mouth, IGV, Rotor and Stator.

I am using mass flow and total temperature at inlet and static pressure at outlet boundary conditions.

However, the numerical model does not rise static pressure and total pressure as the experimental data.

The difference is minimal but I do not understand why this happens.

I have checked the dimensions, boundary conditions and blade angles and everything seems right.

Is there a way to check this problem?

ghorrocks · July 9, 2019, 20:23

Yes, this FAQ describes the process: https://www.cfd-online.com/Wiki/Ansy..._inaccurate.3F

And the link in this FAQ is an excellent guide as well: https://www.cfd-online.com/Wiki/Ansy...publishable.3F

July 9, 2019, 13:14	Reduced pressure rise in numerical simulation	#1
Julian121 Senior Member Join Date: Aug 2012 Posts: 269 Rep Power: 15	I am modelling a 1.5 compressor stage. I have experimental data at inlet to bell-mouth, IGV, Rotor and Stator. I am using mass flow and total temperature at inlet and static pressure at outlet boundary conditions. However, the numerical model does not rise static pressure and total pressure as the experimental data. The difference is minimal but I do not understand why this happens. I have checked the dimensions, boundary conditions and blade angles and everything seems right. Is there a way to check this problem?

July 9, 2019, 20:23		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	Yes, this FAQ describes the process: https://www.cfd-online.com/Wiki/Ansy..._inaccurate.3F And the link in this FAQ is an excellent guide as well: https://www.cfd-online.com/Wiki/Ansy...publishable.3F __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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