Experimental locating of rotor sound source using a compact microphone array

被引:1
|
作者
Zhang, Cui Qing [1 ,2 ]
Gao, Zhi Ying [2 ]
Chen, Yongyan [2 ]
Lv, Wen Chun [1 ,2 ]
Chen, Jin Xia [1 ]
Liu, Yuntao [2 ]
机构
[1] Inner Mongolia Tech Coll Mech & Elect, Dept Elect Engn, Hohhot 010070, Peoples R China
[2] Inner Mongolia Univ Technol, Sch Energy & Power Engn, Hohhot 010051, Peoples R China
基金
中国国家自然科学基金;
关键词
NOISE SOURCE LOCALIZATION; AERODYNAMIC NOISE; WIND;
D O I
10.1063/5.0003236
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
As wind-power installations increase rapidly worldwide in both number and capacity, the noise problems created by wind turbines, which increasingly are being installed near residential areas, are becoming more pressing. For noise-reduction purposes, a wind turbine can be viewed as being a mechanism for generating aerodynamic noise, and key to that noise reduction is a precisely localized sound source. In this paper, the acoustic signal of an S-wing horizontal-axis wind turbine with a diameter of 1.4 m is acquired using a 60-channel microphone array. Using beamforming, the sound-source distribution and frequency characteristics are analyzed in detail, showing different frequency bands at different wind speeds and tip speed ratios. The results show that the sound pressure level of the sound source (i) decreases gradually with increasing frequency band and (ii) increases gradually with increasing wind speed and tip speed ratio. The radial location of the sound source approaches the blade tip gradually, but the variance is not large. The relevant experimental data and conclusions provide a research basis for exploring the mechanism for the aerodynamic noise and ways to reduce it.
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页数:10
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