EXPERIMENTAL STUDY OF EFFECT OF SHEAR TURBULENCE ON WIND TURBINE WAKE RECOVERY CHARACTERISTICS

Han Yuxia; Zhu Changhai; Jin Kaining; Chen Xueming; Yang Bin

doi:10.19912/j.0254-0096.tynxb.2024-0683

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (8) : 151-158. DOI: 10.19912/j.0254-0096.tynxb.2024-0683

EXPERIMENTAL STUDY OF EFFECT OF SHEAR TURBULENCE ON WIND TURBINE WAKE RECOVERY CHARACTERISTICS

Han Yuxia^1,2, Zhu Changhai¹, Jin Kaining¹, Chen Xueming¹, Yang Bin¹

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Abstract

To investigate the influence of shear turbulence on the wake recovery characteristics of wind turbines, a hot-wire anemometer was used to collect data on the wake downstream of a wind turbine under conditions of free flow, uniform turbulence, and shear turbulence in a closed wind tunnel section. By comparing the axial velocity and turbulence intensity of a horizontal-axis wind turbine under three inflow conditions, the effects of uniform turbulence and shear turbulence coupled with tower shadow effects on wake recovery characteristics were analyzed. The results indicate that the wake velocity recovers fastest under uniform turbulence, followed by free flow, with the slowest recovery observed under shear turbulence inflow. Regarding the recovery of wake turbulence intensity, uniform turbulence again exhibits the fastest recovery, followed by shear turbulence, and finally free flow with the slowest recovery. Increased turbulence intensity promotes wake recovery, while wind shear and tower shadow effects inhibit it. Uniform turbulence coupled with tower shadow effects promotes a downward shift in the wake center, whereas shear turbulence coupled with tower shadow effects delays this trend. This indicates that wind shear has a more significant impact on wake skewness than that of the tower shadow effect.

Key words

horizontal axis wind turbine / shear turbulence / wake recovery / tower shadow effect / hot-wire anemometer / wind tunnel experiment

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Han Yuxia, Zhu Changhai, Jin Kaining, Chen Xueming, Yang Bin. EXPERIMENTAL STUDY OF EFFECT OF SHEAR TURBULENCE ON WIND TURBINE WAKE RECOVERY CHARACTERISTICS[J]. Acta Energiae Solaris Sinica. 2025, 46(8): 151-158 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0683

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