A self-similarity scaling for integral boundary layer analysis of vortex generators
conference paper
As the demand for renewable energy increases, wind turbine rotors will become larger with slender blades. Vortex Generators (VGs) are one of the most common methods of passive flow control to avoid flow separation and loading on the root section of slender blades due to their simplicity, inexpensiveness, and the ability to retrofit them to blades. Aerodynamic load calculations for VGs involve long experimental campaigns or resource intensive CFD calculations. Most time intensive aeroelastic optimisation and design tools prefer to use lower fidelity methods made accurate with empirical models and corrections for aerodynamic load calculations of clean airfoils. One such class of tools are viscous-inviscid interaction solvers that use Integral Boundary Layer (IBL) methods for viscous calculations in the boundary layer coupled with an inviscid solver for the rest of the domain. This research applies an IBL framework to vortex generators modelling the effect of VGs on integrated boundary layer quantities. Further, the paper also explores a self-similarity scaling inspired from free-shear plane mixing layer theory for the boundary layer profile downstream of VGs.
Topics
TNO Identifier
978011
Source title
18th EAWE PhD Seminar on Wind Energy 2-4 November 2022, Bruges, Belgium
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