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January 21, 2019, 23:45
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CFX set up about Radial turbine.
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#1 |
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New Member
XUE CHUANZHI
Join Date: Jan 2019
Posts: 5
Rep Power: 8  |
I am using cfx to analyze a radial turbine, but the result is always a problem, please help me look at my problem.
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January 22, 2019, 00:04
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#2 |
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Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,934
Rep Power: 145 |
Yes, we can help you. But you need to tell us what you are trying to do first.
https://www.cfd-online.com/Wiki/Ansy...ible_answer.3F
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Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
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January 22, 2019, 02:33
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#3 |
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New Member
XUE CHUANZHI
Join Date: Jan 2019
Posts: 5
Rep Power: 8 |
Is there a problem with my settings?
Last edited by xcz2017; January 22, 2019 at 07:43. |
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January 22, 2019, 02:37
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#4 |
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New Member
XUE CHUANZHI
Join Date: Jan 2019
Posts: 5
Rep Power: 8 |
This is my setup process. Please help me see if there is a problem?
Last edited by xcz2017; January 22, 2019 at 07:44. |
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January 22, 2019, 03:10
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#5 |
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Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,934
Rep Power: 145 |
Screen dumps of CFX-Pre are not very useful. Please attach:
* Your output file * an image of the flow you are getting * an image showing what you expect to get * an explanation of what the problem you are getting is.
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Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
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January 22, 2019, 07:32
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#6 |
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New Member
XUE CHUANZHI
Join Date: Jan 2019
Posts: 5
Rep Power: 8 |
Turboexpander
GAS: Helium Inlet :Temperature(40.012K) Static pressure 9.6 bar Outlet: Flow rate(17.5g/s) I want to simulate the efficiency of the rotor expander. My calculations always don't converge. Can I use the ideal helium gas as the flowing gas? |
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January 22, 2019, 16:43
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#7 |
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Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,934
Rep Power: 145 |
Not converged: See FAQ https://www.cfd-online.com/Wiki/Ansy...gence_criteria
Can you use Helium? Yes, you can use any fluid you like.
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Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
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January 23, 2019, 21:37
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#8 |
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New Member
XUE CHUANZHI
Join Date: Jan 2019
Posts: 5
Rep Power: 8 |
Why the temperatures and pressures rise during the expansion process? Shouldn't it be a continuous decline?
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January 23, 2019, 22:01
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#9 |
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Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,934
Rep Power: 145 |
I have no idea. When faced with an unexpected result you should check what you are doing, do a validation and verification of your results to ensure your simulation is accurate and if all that still says the unexpected result is present then start thinking about whether you have learnt something new.
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Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
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