Abstract
The interaction of a generic longitudinal wake vortex with an HGR-01 single-element airfoil is simulated with hybrid RANS/LES and compared with reference RANS results. The influence of different grid types in the vortex transport region, either structured hexahedral grid cells or unstructured tetrahedral cells, is shown to be insignificant. Moreover, two modeling approaches of the RANS and LES regions around the airfoil are compared: Firstly, the turbulence in the entire boundary layer is modeled with the RANS approach. Secondly, the turbulence in the boundary layer is partly resolved with the wall-modeled LES approach using synthetic turbulence at the RANS/LES interface. It is found that in the first setup the interaction of the vortex with the boundary layer is weaker than in the second setup with wall-modeled LES, however, the mean flow is comparable in both cases.
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