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Evolution Of Eddy Viscosity In The Wake Of A Wind Turbine, Luis Martínez-Tossas, Juliaan Bossuyt, Nicholas Hamilton, Raul Bayoan Cal
Evolution Of Eddy Viscosity In The Wake Of A Wind Turbine, Luis Martínez-Tossas, Juliaan Bossuyt, Nicholas Hamilton, Raul Bayoan Cal
Mechanical and Materials Engineering Faculty Publications and Presentations
The eddy viscosity hypothesis is a popular method in wind turbine wake modeling for estimating turbulent Reynolds stresses. We document the downstream evolution of eddy viscosity in the wake of a wind turbine from experimental and large-eddy-simulation data.Wake eddy viscosity is isolated from its surroundings by subtracting the inflow profile, and the driving forces are identified in each wake region. Eddy viscosity varies in response to changes in turbine geometry and nacelle misalignment with larger turbines generating stronger velocity gradients and shear stresses. We propose a model for eddy viscosity based on a Rayleigh distribution. Model parameters are obtained from …