STUDY ON INFLUENCE OF TOWER ON SOUND FIELD AND FLOW FIELD IN ROTATING PROCESS OF WIND TURBINE

Shao Mingxue; Su Rina; Zhang Cuiqing; Wang Jianwen; Gao Zhiying

doi:10.19912/j.0254-0096.tynxb.2021-0671

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (12) : 327-335. DOI: 10.19912/j.0254-0096.tynxb.2021-0671

STUDY ON INFLUENCE OF TOWER ON SOUND FIELD AND FLOW FIELD IN ROTATING PROCESS OF WIND TURBINE

Shao Mingxue¹, Gao Zhiying^1,2, Su Rina¹, Zhang Cuiqing¹, Wang Jianwen^1,2

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Abstract

Based on the relationship between pressure pulsation and sound pressure, Fluent numerical simulation platform was used to analyze the sound field and flow field of the whole wind turbine and single rotor in the process of wind turbine rotation. Comparing and analyzing the maximum sound energy positions of the two models, it is found that the acoustic field of the wind turbine is hysteresis to some extent to the flow field due to the interference of the tower, and the hysteresis angle is about 30°. The pressure pulsation in the negative direction of y-axis and the distribution of sound pressure level with rotor rotation azimuth are analyzed. Comparing the azimuth of the first peak, it is found that the SPL lags behind the pressure pulsation by 22°,5°,9°and 18° respectively at the positions of y/R=0.14,y/R=0.42,y/R=0.71 and y/R=1. The variation trend of sound pressure level and pressure pulsation at monitoring points near the two model towers during wind turbine rotation is analyzed. It is found that the amplitude of SPL increases first and then decreases as it moves from the root to the tip, and reaches the maximum at y/R=0.71. Similarly, the amplitude of pressure fluctuation reaches its maximum at y/R=0.71 and the slope of the peak and valley fluctuations is at its maximum.

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wind turbines / tower / rotation / azimuth / rotor / numerical simulation

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Shao Mingxue, Gao Zhiying, Su Rina, Zhang Cuiqing, Wang Jianwen. STUDY ON INFLUENCE OF TOWER ON SOUND FIELD AND FLOW FIELD IN ROTATING PROCESS OF WIND TURBINE[J]. Acta Energiae Solaris Sinica. 2022, 43(12): 327-335 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0671

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