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Problems about streamline in the axial diffuser |
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May 27, 2014, 13:51 |
Problems about streamline in the axial diffuser
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#1 |
New Member
shaodong
Join Date: Jun 2013
Posts: 4
Rep Power: 13 |
Hi, all.
This is my simulation of one centrifugal compressor. The BC of inlet is 1 atm for total pressure, 288.15 K for total temperature, axial direction for flow direction, and the BC of outlet is 3.4 atm for static pressure. The rotating speed of impeller is 28000 rpm. When I checked the results in the view of B2B in CFD-post, I found the streamline in the axial diffuser was curly (the right one)while the upstream streamline in the radial diffuser (the left one )looked normal. Has anyone got this problem before? Thank you for reading my post. |
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May 27, 2014, 20:05 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,868
Rep Power: 144 |
Do you mean the ripples in the streamlines?
This could be a numerical artifact: * Rerun with a finer mesh * Converge tighter * Better mesh quality and see if it goes away. OR it could be real. Turbulence transition looks somewhat like that. |
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centrifugal compressor, cfx, diffuser |
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