[jafar]

Hi evrybody
I'm doing a centrifugal compressor with vaned diffuser(operating in subsonic regime) simulation, using CFX. when I choose mass flow rate in outlet and static pressure in inlet boundary there is no problem and the results are acceptable, but when I choose pressure in outlet boundary, flow COMPLETELY reveresed in both inlet and outlet boundary. I've tried these conditions:
- changing pressure value
- changing angular velocity
- Opening boundary condition
- outlet average static pressure(average over whole outlet)
- setting mass flow target in rotor-stator interface
but there is no improvement
I appreciate any HELP
thanks.