airinnova / pytornado

:airplane: An implementation of the vortex-lattice method (VLM)
https://pytornado.readthedocs.io/
Apache License 2.0
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Divergence on some panels when using an angle of sideslip #22

Open aidanjungo opened 4 years ago

aidanjungo commented 4 years ago

I think I mention this issue a few weeks ago, here's more details about it.

In the CPACS file attached I calculated some points with different angle of attack and sideslip (see the aeromap "test_Aeromap_30points_aoa_aos"). For some value couples the aerodynamic coefficient are extremely high, in this case for:

I try to change the panel discretization, the coefficient values change but the problem is still the same.

I plotted the pressure coefficient for one of this configuration and we can see that it diverges on some cells. I imagine it could due to the fact that the wake of these cells "touch" other cells of the tail...

issue_with_aos

D150_PyTornado_aos_issue.zip