centrifugal compressor stimulation

Aysiyi · September 30, 2013, 20:54

Hello,

I'm new to CFX software. I am trying to stimulate a centrifugal compressor. the model include a impeller passage, a diffuser passage,a whole volute. The inlet boundry is total pressure, total temperature, direction of velocity. The outlet boundry is mass flow. it is a steady stimulation. But during solving, the mass flow of inlet isn't equal to outlet,and when I change the mass flow of outlet, the mass flow of inlet isn't changed. I don't know why,and who can help me?

ghorrocks · October 1, 2013, 20:34

It sounds like your simulation is not converged. It can take a few iterations for the changes at the inlet to propagate to the outlet, and a few more iterations to establish the new equilibrium.

joejaking · March 8, 2014, 09:50

Aysiyi, had you solved the problem? recently i met this question too, can you help me?

Lance · March 10, 2014, 02:12

I didnt know you could stimulate a compressor? It sounds nasty

September 30, 2013, 20:54	centrifugal compressor stimulation	#1
Aysiyi Member aysiyi Join Date: Nov 2012 Posts: 40 Rep Power: 13	Hello, I'm new to CFX software. I am trying to stimulate a centrifugal compressor. the model include a impeller passage, a diffuser passage,a whole volute. The inlet boundry is total pressure, total temperature, direction of velocity. The outlet boundry is mass flow. it is a steady stimulation. But during solving, the mass flow of inlet isn't equal to outlet,and when I change the mass flow of outlet, the mass flow of inlet isn't changed. I don't know why,and who can help me?

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October 1, 2013, 20:34		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	It sounds like your simulation is not converged. It can take a few iterations for the changes at the inlet to propagate to the outlet, and a few more iterations to establish the new equilibrium.

March 8, 2014, 09:50		#3
joejaking New Member Jiang Jiaqing Join Date: Jun 2013 Posts: 1 Rep Power: 0	Aysiyi, had you solved the problem? recently i met this question too, can you help me?

March 10, 2014, 02:12		#4
Lance Senior Member Lance Join Date: Mar 2009 Posts: 669 Rep Power: 22	I didnt know you could stimulate a compressor? It sounds nasty