Acoustic Radiation of a Turbulent Boundary Layer Over a Flat Smooth Boundary

IF 0.9 4区物理与天体物理 Q4 ACOUSTICS

Acoustical Physics Pub Date : 2025-03-07 DOI:10.1134/S1063771024603133

I. V. Belyaev, V. F. Kopiev, M. A. Mironov

引用次数: 0

Abstract

A consistent theory of sound generation in a turbulent boundary layer developing over a flat smooth boundary at low Mach numbers is presented. The main source of sound and the long-wavelength part of pressure fluctuations on the boundary are incoming shear (viscous) waves generated by Lighthill quadrupoles in the near-wall region of the turbulent boundary layer. It is shown that with an increase in the Reynolds number (decrease in viscosity), the role of viscosity in sound generation does not decrease, but instead increases. Quantitative estimates of the spectrum of the sound power density generated in a turbulent boundary layer are given.

查看原文本刊更多论文

本文提出了低马赫数下在平坦光滑边界上发展的湍流边界层中声音产生的一致理论。声源的主要来源和边界上压力波动的长波部分是湍流边界层近壁区Lighthill四极产生的入射剪切（粘性）波。结果表明，随着雷诺数的增大（即粘度的减小），粘度在声音产生中的作用不但没有减小，反而增大了。给出了在湍流边界层中产生的声功率密度谱的定量估计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Acoustical Physics 物理-声学

CiteScore

1.60

自引率

50.00%

发文量

审稿时长

3.5 months

期刊介绍： Acoustical Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It covers theoretical and experimental aspects of basic and applied acoustics: classical problems of linear acoustics and wave theory; nonlinear acoustics; physical acoustics; ocean acoustics and hydroacoustics; atmospheric and aeroacoustics; acoustics of structurally inhomogeneous solids; geological acoustics; acoustical ecology, noise and vibration; chamber acoustics, musical acoustics; acoustic signals processing, computer simulations; acoustics of living systems, biomedical acoustics; physical principles of engineering acoustics. The journal publishes critical reviews, original articles, short communications, and letters to the editor. It covers theoretical and experimental aspects of basic and applied acoustics. The journal welcomes manuscripts from all countries in the English or Russian language.