关于紧凑型球形多孔传声器防风罩内风速和压力谱的一则注释

A note on wind velocity and pressure spectra inside compact spherical porous microphone windscreens.

作者信息

Niu Feng, Zhao Sipei, Qiu Xiaojun, Zhang Dong

机构信息

Ministry of Education Key Laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University, Nanjing, China.

Centre for Audio, Acoustics and Vibration, University of Technology Sydney, Sydney,

出版信息

J Acoust Soc Am. 2020 Jan;147(1):EL43. doi: 10.1121/10.0000592.

DOI:10.1121/10.0000592

PMID:32007000

Abstract

Simultaneous measurements of wind velocity and pressure fluctuations were conducted in a wind tunnel to investigate the wind noise source inside compact spherical open celled porous windscreens. The existing outdoor wind noise models are found to be inadequate to predict the wind noise inside a wind tunnel. This paper proposes a model to predict the interior stagnation pressure, which agrees with the wind noise measured inside the windscreen within a bandwidth, where the exterior turbulence-turbulence interaction pressure overestimates the wind noise level. The limitations of the proposed model and other potential sources for wind noise inside porous windscreens are discussed.

摘要

在风洞中同时测量风速和压力波动，以研究紧凑型球形开孔多孔挡风玻璃内部的风噪声源。发现现有的室外风噪声模型不足以预测风洞内的风噪声。本文提出了一个预测内部驻点压力的模型，该模型在一个带宽内与挡风玻璃内部测得的风噪声一致，在该带宽内，外部湍流-湍流相互作用压力高估了风噪声水平。讨论了所提出模型的局限性以及多孔挡风玻璃内部风噪声的其他潜在来源。