基于传声器阵列的低速空腔噪声控制实验研究

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摘要基于相位传声器阵列在声学风洞中测量了低速空腔流动中主要噪声源的分布特性，提出了一种新的评估气动声源强度的计算方法。通过在空腔前后缘加装锯齿板和阻挡板的方式探索了空腔噪声抑制策略，并且比较了不同措施的降噪效果。结果表明：低速空腔流动噪声主要来自于剪切层与空腔后壁的相互作用；锯齿板以沿来流方向安装在前缘对空腔噪声控制效果最好，且锯齿越密集，噪声抑制效果越明显；阻挡板对空腔噪声控制效果不理想。

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	马瑞轩1
	2
	李征初1
	宋玉宝1
	王勋年1
	2

关键词 ：传声器阵列, 空腔流动, 风洞实验, 噪声抑制

Abstract：The primary noise sources distribution of the low-speed cavity flow is measured in the aeroacoustic wind tunnel using the phase microphone array, with which a new method for evaluating the intensity of aerodynamic sound sources is proposed. The suppression strategy of cavity noise is explored by installing sawtooth panel and straight panel on the front and rear edges of the cavity, and the noise reduction effects of different measures are compared. The results show that the low-speed cavity flow noise mainly comes from the interaction between the shear layer and the rear edge of the cavity. The sawtooth panel installed along the incoming flow direction on the front edge has the best effect on cavity noise control. Furthermore, the denser the sawteeth, the better it works for the noise suppression. The effect of the straight panel on cavity noise control is not ideal.

Key words： phase microphone array cavity flow wind tunnel test noise suppression

收稿日期: 2020-08-03 出版日期: 2022-03-15

引用本文:

马瑞轩1,2，李征初1，宋玉宝1，王勋年1,2. 基于传声器阵列的低速空腔噪声控制实验研究[J]. 振动与冲击, 2022, 41(5): 267-272.
MA Ruixuan1,2, LI Zhengchu1, SONG Yubao1, WANG Xunnian1,2. Low-speed cavity noise control tests based on microphone array. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(5): 267-272.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2022/V41/I5/267

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