centrifugal compressor analysis

farzadmech88 · June 4, 2013, 05:34

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

farzadmech88 · June 4, 2013, 05:39

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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June 4, 2013, 05:39		#2
farzadmech88 New Member farzad Join Date: Jun 2013 Posts: 5 Rep Power: 12	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.""