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Large-Eddy Simulation of Wakes of Waked Wind Turbinesopen access

Authors
Liu, XiaohaoLi, ZhaobinYang, XiaoleiXu, DuoKang, SeokkooKhosronejad, Ali
Issue Date
Apr-2022
Publisher
MDPI
Keywords
wind turbine wakes; waked turbine; large-eddy simulation; actuator surface model
Citation
ENERGIES, v.15, no.8, pp.1 - 26
Indexed
SCIE
SCOPUS
Journal Title
ENERGIES
Volume
15
Number
8
Start Page
1
End Page
26
URI
https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/138916
DOI
10.3390/en15082899
ISSN
1996-1073
Abstract
The wake dynamics of a wind turbine are influenced by the atmospheric turbulence and the wake of its upwind turbine. In this work, we investigate the wake characteristics of a waked wind turbine for four different downwind spacings and three different inflows using large-eddy simulation with a turbine parameterized using the actuator surface model. The wake statistics of the waked turbine are compared with those of the stand-alone wind turbine under the same inflow. The results show that the oncoming wake significantly affects the near wake of the waked turbine, where it accelerates the wake recovery by increasing the turbulent convection, and increases the turbulence kinetic energy. The velocity deficit and turbulence kinetic energy in the far wake, on the other hand, are fairly similar with each other for the considered different turbine spacings, and are close to those of the stand-alone wind turbine. As for the wake meandering of the waked wind turbines, it is initiated quickly and enhanced by the oncoming wake turbulence, as shown by the meandering amplitudes and the power spectral density of the instantaneous wake positions. The growth rates of the wake meandering from the waked wind turbines, on the other hand, are close to that of the stand-alone wind turbine, indicating the critical role of the atmospheric turbulence on wake meandering. The present work details how the oncoming wake influences the wake dynamics of the downwind turbine, and provides physical insights on developing engineering models to take into account such effects.
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서울 공과대학 > 서울 건설환경공학과 > 1. Journal Articles

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COLLEGE OF ENGINEERING (DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING)
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