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Open AccessArticle

AD/RANS Simulations of Wind Turbine Wake Flow Employing the RSM Turbulence Model: Impact of Isotropic and Anisotropic Inflow Conditions

1
Jiangsu Key Laboratory of Hi-Tech Research for Wind Turbine Design, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2
Department of Wind Energy, Fluid Mechanics Section, Technical University of Denmark, DK-2800 Lyngby, Denmark
*
Author to whom correspondence should be addressed.
Energies 2019, 12(21), 4026; https://doi.org/10.3390/en12214026
Received: 29 September 2019 / Revised: 21 October 2019 / Accepted: 21 October 2019 / Published: 23 October 2019
(This article belongs to the Collection Wind Turbines)
The Reynolds-averaged Navier–Stokes (RANS)-based generalized actuator disc method along with the Reynolds stress model (AD/RANS_RSM) is assessed for wind turbine wake simulation. The evaluation is based on validations with four sets of experiments for four horizontal-axis wind turbines with different geometrical characteristics operating in a wide range of wind conditions. Additionally, sensitivity studies on inflow profiles (representing isotropic and anisotropic turbulence) for predicting wake effects are carried out. The focus is on the prediction of the evolution of wake flow in terms of wind velocity and turbulence intensity. Comparisons between the computational results and the measurements demonstrate that in the near and transition wake region with strong anisotropic turbulence, the AD/RANS_RSM methodology exhibits a reasonably good match with all the experimental data sets; however, in the far wake region that is characterized by isotropic turbulence, the AD/RANS_RSM predicts the wake velocity quite accurately but appears to over-estimate the wake turbulence level. While the introduction of the overall turbulence intensity is found to give an improved agreement with the experiments. The performed sensitivity study proves that the anisotropic inflow condition is recommended as the profile of choice to represent the incoming wind flow. View Full-Text
Keywords: wind turbine wake; actuator disc model; Reynolds stress model; Sexbierum wind farm; wind tunnel; wake recovery; turbulence intensity wind turbine wake; actuator disc model; Reynolds stress model; Sexbierum wind farm; wind tunnel; wake recovery; turbulence intensity
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MDPI and ACS Style

Tian, L.; Song, Y.; Zhao, N.; Shen, W.; Wang, T. AD/RANS Simulations of Wind Turbine Wake Flow Employing the RSM Turbulence Model: Impact of Isotropic and Anisotropic Inflow Conditions. Energies 2019, 12, 4026. https://doi.org/10.3390/en12214026

AMA Style

Tian L, Song Y, Zhao N, Shen W, Wang T. AD/RANS Simulations of Wind Turbine Wake Flow Employing the RSM Turbulence Model: Impact of Isotropic and Anisotropic Inflow Conditions. Energies. 2019; 12(21):4026. https://doi.org/10.3390/en12214026

Chicago/Turabian Style

Tian, Linlin; Song, Yilei; Zhao, Ning; Shen, Wenzhong; Wang, Tongguang. 2019. "AD/RANS Simulations of Wind Turbine Wake Flow Employing the RSM Turbulence Model: Impact of Isotropic and Anisotropic Inflow Conditions" Energies 12, no. 21: 4026. https://doi.org/10.3390/en12214026

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