SOUND SOURCE ANALYSIS OF BLADE AERODYNAMIC NOISE OF MEGAWATT WIND TURBINE BASED ON VORTEX SOUND THEORY

He Ruirong; Liu Houcai; Kang Huimin; Zhang Xuewen; Xi Jiale; Shen Xiangjun

doi:10.19912/j.0254-0096.tynxb.2024-0463

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (7) : 413-420. DOI: 10.19912/j.0254-0096.tynxb.2024-0463

Special Topics of Academic Papers at the 69th Annual Meeting of the China Association for Science and Technology

SOUND SOURCE ANALYSIS OF BLADE AERODYNAMIC NOISE OF MEGAWATT WIND TURBINE BASED ON VORTEX SOUND THEORY

He Ruirong¹, Liu Houcai¹, Kang Huimin¹, Zhang Xuewen², Xi Jiale¹, Shen Xiangjun¹

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Abstract

Based on the vortex sound theory, the generation mechanism of turbine blade aerodynamic noise from wind turbine blades is studied. In this paper, wind turbine blades and flow field regions are modeled and meshed, and the directivity of wind turbine aerodynamic noise is analyzed by computational fluid dynamics（CFD） numerical simulation. Through test verification, it is concluded that wind turbine aerodynamic noise is a dipole characteristic, and the accuracy of numerical simulation is verified. Then, the distribution of flow field and sound field calculated by numerical simulation are analyzed and compared, and the main causes of wind turbine blade aerodynamic noise are studied. The results show that the aerodynamic noise sources of wind turbine blades are mainly distributed in 65%~95% span of the blade spanwise direction. At the same time, the sound source of wind turbine blade aerodynamic noise is mainly caused by vortex movement caused by fluid movement, and the distribution pattern of vortex movement in the range of 65%~95% of blade span is very consistent with the distribution law of blade aerodynamic noise.

Key words

aerodynamic noise / wind turbines / wind turbine blades / vortex sound theory / vortex motion / dipole characteristic / numerical simulation

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He Ruirong, Liu Houcai, Kang Huimin, Zhang Xuewen, Xi Jiale, Shen Xiangjun. SOUND SOURCE ANALYSIS OF BLADE AERODYNAMIC NOISE OF MEGAWATT WIND TURBINE BASED ON VORTEX SOUND THEORY[J]. Acta Energiae Solaris Sinica. 2025, 46(7): 413-420 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0463

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