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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-2020-115
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2020-115
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  10 Nov 2020

10 Nov 2020

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This preprint is currently under review for the journal WES.

How realistic are the wakes of scaled wind turbine models?

Chengyu Wang, Filippo Campagnolo, Helena Canet, Daniel J. Barreiro, and Carlo L. Bottasso Chengyu Wang et al.
  • Wind Energy Institute, Technische Universität München, D-85748 Garching b. München, Germany

Abstract. The aim of this paper is to analyze to which extent wind tunnel experiments can represent the behavior of full-scale wind turbine wakes. The question is relevant because on the one hand scaled models are extensively used for wake and farm control studies, whereas on the other hand not all wake-relevant physical characteristics of a full-scale turbine can be exactly matched by a scaled model. In particular, a detailed scaling analysis reveals that the scaled model accurately represents the principal physical phenomena taking place in the outer shell of the near wake, whereas differences exist in its inner core. A large eddy simulation actuator line method is first validated with respect to wind tunnel measurements, and then used to perform a detailed comparison of the wake at the two scales. It is concluded that, notwithstanding the existence of some mismatched effects, the scaled wake is remarkably similar to the full-scale one, except in the immediate proximity of the rotor.

Chengyu Wang et al.

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Chengyu Wang et al.

Chengyu Wang et al.

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Latest update: 01 Dec 2020
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Short summary
This paper quantifies the fidelity of the wakes generated by small (1 m diameter) scaled wind turbine models operated in a large boundary layer wind tunnel. A detailed scaling analysis accompanied by LES simulations show that these wakes are very realistic scaled versions of the ones generated by the parent full-scale wind turbine in the field.
This paper quantifies the fidelity of the wakes generated by small (1 m diameter) scaled wind...
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