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centrifugal compressor analysis

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Old   June 4, 2013, 05:34
Post centrifugal compressor analysis
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farzad
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Dear all
this is Farzad, and I want ti simulate a centrifugal compressor, but I have some problems.
I use blade-generator and I exported it to design-modeler,I mesh it, now I face a problem in fluent(solver) sectio.
1- I use MRF , but I don't know the exact rotation direction, is it (Z) or (-Z)?

2- in tutorials they use oressur inlet and pressure outlet, why? do we must know these quantities?

3- after all when I run calculations, after few iterations I observe REVERSED FLOW.

I appreciate your helps in advance.
Farzad
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File Type: jpg ASLI ROT Z.jpg (28.3 KB, 8 views)

Last edited by farzadmech88; June 4, 2013 at 10:48.
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Old   June 4, 2013, 05:39
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farzad
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this is my mail problem:

""
I am doing CFD analysis of compressor in FLUENT.
but i am facing the problem of REVERSED FLOW at inlet as well as outlet with Pressure outlet condition.
i am using density based solver.Is it appropriate??
If i am using IDEAL GAS as fluid then it shows very large values of ranges pressure, temperature and velocity.""
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