How to achieve the Characteristic Imposed Outlet Boundary Condition in other solver?

Soll · March 13, 2018, 02:30

In Numeca, there is a special outlet boundary condition named Characteristic Imposed. The details of this method is explained in the attached .jpd file. It mainly solve the problem that we no longer need to shift from pressure boundary to mass flow boundary when the operation point moves from choking to stalling in turbomachinery performance curve calculation.
My question is how to apply it to another solver using udf, in other words, do you have any clues how does the three equations really work in Numeca.

colinda1 · March 19, 2018, 05:45

Dear Soll,

The documentation of NUMECA software is provided to customers only and should not be distributed to others (please have a look at the license agreement). May I ask you to remove this picture from this public forum please?

Best regards,
Colinda

NUMECA International

Soll · March 21, 2018, 07:51

Sorry about that.
Can you possibly provide any advice?

March 13, 2018, 02:30	How to achieve the Characteristic Imposed Outlet Boundary Condition in other solver?	#1
Soll New Member Zeng Join Date: Jul 2017 Location: London, UK Posts: 16 Rep Power: 8	In Numeca, there is a special outlet boundary condition named Characteristic Imposed. The details of this method is explained in the attached .jpd file. It mainly solve the problem that we no longer need to shift from pressure boundary to mass flow boundary when the operation point moves from choking to stalling in turbomachinery performance curve calculation. My question is how to apply it to another solver using udf, in other words, do you have any clues how does the three equations really work in Numeca. Last edited by Soll; March 21, 2018 at 07:50.

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March 19, 2018, 05:45		#2
colinda1 Senior Member Colinda Join Date: May 2012 Location: Brussels Posts: 151 Rep Power: 13	Dear Soll, The documentation of NUMECA software is provided to customers only and should not be distributed to others (please have a look at the license agreement). May I ask you to remove this picture from this public forum please? Best regards, Colinda NUMECA International

March 21, 2018, 07:51		#3
Soll New Member Zeng Join Date: Jul 2017 Location: London, UK Posts: 16 Rep Power: 8	Sorry about that. Can you possibly provide any advice?