Recording the Frequency Spectrum of Near-Wall Turbulent Pressures on an Acoustic Noise Background


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.

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The study was supported by the Russian Foundation for Basic Research (project no. 20-02-00181-a).

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Correspondence to E. B. Kudashev or L. R. Yablonik.

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Kudashev, E.B., Yablonik, L.R. Recording the Frequency Spectrum of Near-Wall Turbulent Pressures on an Acoustic Noise Background. Acoust. Phys. 66, 633–638 (2020).

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  • Near-wall pressure fluctuations
  • flow noise
  • frequency-wave spectra
  • acoustic noise
  • wave filtering of pressure fluctuations