Abstract

The paper considers the problem of recording the spectral components of the frequency spectrum of near-wall turbulent pressures under the effect of acoustic noise. The previously proposed method for measuring pressure fluctuations on an acoustic noise background uses a two-element pressure transducer that wave-filters the measured turbulent fluctuation field. Here, we analytically investigate the wave properties of a two-element transducer in the turbulent pressures field. With proper selection of the characteristics, the proposed pressure fluctuation receiver, due to its wave properties, can cut off the acoustic noise contribution to the measurement results. The parameters and relations determining the conditions for efficient acoustic noise suppression are established.

中文翻译：

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在声噪声背景下记录近壁湍流压力的频谱

摘要

本文考虑了在声噪声作用下记录近壁湍流压力频谱频谱分量的问题。先前提出的用于在声学噪声背景下测量压力波动的方法使用了两元件压力传感器，该传感器对所测得的湍流波动场进行了滤波。在这里，我们分析性地研究了两元件换能器在湍流压力场中的波动特性。用的特性适当选择，所提出的压力波动接收机，由于它的波的特性，可以切断到的测量结果的声学噪声的贡献。建立确定有效声噪声抑制条件的参数和关系。