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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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https://doi.org/10.5194/wes-2020-3
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2020-3
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  11 Feb 2020

11 Feb 2020

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This preprint is currently under review for the journal WES.

Controls-Oriented Model for Secondary Effects of Wake Steering

Jennifer King, Paul Fleming, Ryan King, Luis A. Martínez-Tossas, Christopher J. Bay, Rafael Mudafort, and Eric Simley Jennifer King et al.
  • National Wind Technology Center, National Renewable Energy Laboratory, Golden, CO, 80401, USA

Abstract. This paper presents a model to incorporate the secondary effects of wake steering in large arrays of turbines. Previous models have focused on the aerodynamic interaction of wake steering between two turbines. The model proposed in this paper builds on these models to include yaw-induced wake recovery and secondary steering seen in large arrays of turbines when wake steering is performed. Turbines operating in yaw misaligned conditions generate counter-rotating vortices that entrain momentum and contribute to the deformation and deflection of the wake at downstream turbines. Rows of turbines can compound the effects of wake steering that benefit turbines far downstream. This model quantifies these effects and demonstrates that wake steering has greater potential to increase the performance of a wind farm due to these counter-rotating vortices especially for large rows of turbines. This is validated using numerous large eddy simulations for two-turbine, three-turbine, five-turbine, and wind farm scenarios.

Jennifer King et al.

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Jennifer King et al.

Jennifer King et al.

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Latest update: 13 Aug 2020
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Short summary
This paper highlights the secondary effects of wake steering including yaw-added wake recovery and secondary steering. These effects enhance the value of wake steering especially when applied to a large wind farm. This paper models these secondary effects using an analytical model proposed in the paper. The results of this model are compared with large-eddy simulations for several cases including two-turbine, three-turbine, five-turbine, and 38-turbine cases.
This paper highlights the secondary effects of wake steering including yaw-added wake recovery...
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