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HP Turbine boundary Condtions?

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Old   July 28, 2003, 13:19
Default HP Turbine boundary Condtions?
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I have a 3d stator-rotor HPT stage grid. I am not sure whether I am using the correct BC's to study the interaction. Rotor blade : Wall Stator Blade: Wall Rotor Hub: Wall Stator Hub: Wall Rotor Inlet : Pressure Inlet Rotor Outlet: Pressure Outlet Stator Inlet: Pressure Inlet Stator Outlet: Pressure Outlet

Mixing Plane: Stator Outlet- Rotor Inlet

Here is what I am not sure about

Pitchwise boundary of Stator Grid - I am using periodic BC will it be rotational periodic or translational periodic

Pitchwise boundary of Rotor grid: Will it be rotational or translational periodic

Mid Spanwise cutting plane parallel to hub : I am using symmetry but I have a 3d curved profile. Think this is not the one I should be using.

Any help?

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Old   September 14, 2003, 00:16
Default Re: HP Turbine boundary Condtions?
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I am a beginner in this area also. But I think for your questions 1&2, the answer would be rotational because the turbine is 3D and rotating. For the mid-span cutting, can you tell what other options available besides symmetry? Symmetry sounds right though, if I understand the options correctly. Or, are you trying to ask the software to cut out and simulate a 2D-geometry out of the 3D original model?
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