Abstract
The present paper introduces a coupled Navier–Stokes/Vortex–Panel solver for the computational study of incompressible high Reynolds number flow around horizontal axis wind turbines. The Navier–Stokes solver is confined to the near-field around one wind turbine blade; the Vortex–Panel method accounts for the far-field of a two-bladed rotor. A robust coupling between both methods is achieved through the spanwise distribution of bound circulation determined by Stokes’ theorem. The coupled solver reduces both artificial dissipation and computational cost compared to a full-domain Navier–Stokes analysis. Results obtained for inviscid and attached viscous flow around an optimal wind turbine blade are compared to a vortex model based on strip theory. Good agreement is found between both models that serves as a validation of the coupled solver for future applications to wind turbines.
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