Compressor Surge Analysis- CFX

Prak_32 · February 16, 2015, 08:58

Hi,

I am working on comparing the surge behavior of a compressor with some design modifications. I am using a single blade passage for the same.

I have my simulations running, but I need to compare the surge behavior of the same. How can I do that ?

I read in a few papers to monitor the pressure fluctuations at a boundary and these variations can give an indication of stability. How can I do this?

Or is there any other method I can use?

Looking forward to replies

Regards
Prakhar

ghorrocks · February 16, 2015, 17:29

Have you read the best practices guide in the CFX Reference manual? It gives lots of information about these sort of models.

Prak_32 · February 17, 2015, 05:15

Quote:

Originally Posted by ghorrocks

Have you read the best practices guide in the CFX Reference manual? It gives lots of information about these sort of models.

Dear Glenn,

Yes I have read the best practice guide, I agree it gives a lot of insight but unfortunately I could not find my answer there.

I am simulating two centrifugal compressor design's and need to compare their surge behavior ( low mass flow rate stability). I read some papers on the same which said to monitor or plot the pressure variation at a boundary. Comparison between the amplitude of oscillations can indicate the marginal stability of performance. Is this correct?? If yes how can I monitor the pressure?

Is there any other method to predict/ monitor the compressor surge?

Regards
Prakhar

ghorrocks · February 17, 2015, 18:07

I am not an expert on compressor design. If you have quality research papers which describe a method as you describe then that sounds like a good thing to try.

Thomas MADELEINE · February 18, 2015, 04:53

If the paper is available online, can you send a link to it please ?
I am very interested about it

February 16, 2015, 08:58	Compressor Surge Analysis- CFX	#1
Prak_32 New Member Prakhar Join Date: Dec 2013 Posts: 16 Rep Power: 12	Hi, I am working on comparing the surge behavior of a compressor with some design modifications. I am using a single blade passage for the same. I have my simulations running, but I need to compare the surge behavior of the same. How can I do that ? I read in a few papers to monitor the pressure fluctuations at a boundary and these variations can give an indication of stability. How can I do this? Or is there any other method I can use? Looking forward to replies Regards Prakhar

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February 16, 2015, 17:29		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	Have you read the best practices guide in the CFX Reference manual? It gives lots of information about these sort of models.

February 17, 2015, 18:07		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	I am not an expert on compressor design. If you have quality research papers which describe a method as you describe then that sounds like a good thing to try.

February 18, 2015, 04:53		#5
Thomas MADELEINE Senior Member Thomas MADELEINE Join Date: Oct 2014 Posts: 126 Rep Power: 12	If the paper is available online, can you send a link to it please ? I am very interested about it