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fan boundary condition and angle of attack

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Old   February 22, 2022, 06:12
Default fan boundary condition and angle of attack
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Caserta
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I am using the boundary condition fan in fluent 2020 R1 to analyze the rotation of the fan immersed in a current at angle of attack alpha 4, in fact the input speed has the components vx = v * cos (4) and vz = v * sin (4) since the reference system is such that the x axis is coincident with the axis of rotation of the fan, z upwards and ya left, as can be seen from the draft.
I want the fan rotation axis to be in the x direction and in the fluid panel I set (1,0,0) for rotation axis direction and (0,0,0) for origin. I still don't understand why the contour produces a different tangential velocity profile than what I expect. Is it influenced by the angle of attack? how can I solve this problem?


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Old   February 22, 2022, 22:17
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actual problem description is not clear
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Old   August 25, 2022, 07:53
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Ritik Gupta
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You can try rotating the surface for fan boundary condition to the desired angle of attack while keeping the inlet condition at 0 deg AoA.
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