An analytical model for a full wind turbine wake

Abstract

An analytical wind turbine wake model is proposed to predict the wind velocity distribution for all distances downwind of a wind turbine, including the near-wake. This wake model augments the Jensen model and subsequent derivations thereof, and is a direct generalization of that recently proposed by Bastankhah and Porte-Agel. The model is derived by applying conservation of mass and momentum in the context of actuator disk theory, and assuming a distribution of the double-Gaussian type for the velocity deficit in the wake. The physical solutions are obtained by appropriate mixing of the waked- and freestream velocity deficit solutions, reflecting the fact that only a portion of the fluid particles passing through the rotor disk will interact with a blade.

Conference Proceedings: The Science of Making Torque from Wind (TORQUE 2016), October 2016, Munich, Germany. Typographical corrections: Expressions for M, N corrected; Caligraphic C replaced with C in a number of places in section 2

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