RESEARCH ON AERODYNAMIC NOISE RADIATION CHARACTERISTICS OF HORIZONTAL AXIS WIND TURBINES UNDER YAW CONDITIONS

Song Jiye; Zhao Zhenzhou; Liu Yige; Liu Yan; Su Chunhao; Li Shijun

doi:10.19912/j.0254-0096.tynxb.2024-1131

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (11) : 597-603. DOI: 10.19912/j.0254-0096.tynxb.2024-1131

RESEARCH ON AERODYNAMIC NOISE RADIATION CHARACTERISTICS OF HORIZONTAL AXIS WIND TURBINES UNDER YAW CONDITIONS

Song Jiye¹, Zhao Zhenzhou², Liu Yige¹, Liu Yan¹, Su Chunhao¹, Li Shijun¹

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Abstract

To investigate yaw's influence on aerodynamic noise, the NREL 5MW was studied using a semi-empirical model to analyze sound field directionality, sound radiation spectrum, sound propagation, and amplitude modulation noise in the near wake region under zero yaw and counterclockwise rotations of 5°, 10°, and 20°around the +z axis. Results show that yaw rotates the sound source direction, with sound pressure level and spectral characteristics largely unchanged. Peak sound pressure level is in the mid-to-low frequency range; axial and radial noise attenuates with yaw, but axial noise increases. Amplitude modulation noise is strongest in the crosswind direction, opposite the sound source, and yaw can reduce cross wind amplitude modulation noise by 2-6 dB. Therefore, the sound level and amplitude modulation noise intensity under specific wind directions can be reduced by adjusting the yaw angle.

Key words

wind turbine / aeroacoustics / yaw / sound pressure level / azimuth angle

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Song Jiye, Zhao Zhenzhou, Liu Yige, Liu Yan, Su Chunhao, Li Shijun. RESEARCH ON AERODYNAMIC NOISE RADIATION CHARACTERISTICS OF HORIZONTAL AXIS WIND TURBINES UNDER YAW CONDITIONS[J]. Acta Energiae Solaris Sinica. 2025, 46(11): 597-603 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1131

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