Compressible Flow, Temperature Problem

EDD1E · November 6, 2022, 02:31

Hi everyone,

I am simulating a gas turbine stator passage and I have some Problems with the convergence. I set a Monitor Points behind my Blade near to the Shroud for Pressure and Temperature. While the Monitor Point for Pressure is not changing, the Monitor Points for Temperatur is Oscillating.
The RMS Residuals are between 10^-4 and 10^-5.

The flow is compressible, so that I am using the Total Energy Modell with Air Ideal Gas. At the Inlet I set a Total Pressure and at the Outlet a Static Pressure.

Does anyone habe any suggestions?

Tim

ghorrocks · November 6, 2022, 05:43

My suggestion is read the FAQ on this: https://www.cfd-online.com/Wiki/Ansy...gence_criteria

Opaque · November 9, 2022, 11:55

Would you mind posting plots for the convergence of MassMomentun and Heat Transfer?

You can also create an additional plot for the Imbalances showing for P-Mass, H-Energy and U/V/W-Mom

November 6, 2022, 02:31	Compressible Flow, Temperature Problem	#1
EDD1E New Member Tim Join Date: Feb 2021 Posts: 3 Rep Power: 5	Hi everyone, I am simulating a gas turbine stator passage and I have some Problems with the convergence. I set a Monitor Points behind my Blade near to the Shroud for Pressure and Temperature. While the Monitor Point for Pressure is not changing, the Monitor Points for Temperatur is Oscillating. The RMS Residuals are between 10^-4 and 10^-5. The flow is compressible, so that I am using the Total Energy Modell with Air Ideal Gas. At the Inlet I set a Total Pressure and at the Outlet a Static Pressure. Does anyone habe any suggestions? Tim

November 6, 2022, 05:43		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,781 Rep Power: 143	My suggestion is read the FAQ on this: https://www.cfd-online.com/Wiki/Ansy...gence_criteria __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

November 9, 2022, 11:55		#3
Opaque Senior Member Join Date: Jun 2009 Posts: 1,832 Rep Power: 33	Would you mind posting plots for the convergence of MassMomentun and Heat Transfer? You can also create an additional plot for the Imbalances showing for P-Mass, H-Energy and U/V/W-Mom __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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