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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN 印刷: 2152-5102
ISSN オンライン: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v33.i5.60
pages 458-472

Sound Generation by a Limited Region of Disturbed Flow in a Rigid Channel of Circular Cross-Section. Particular Cases

A. O. Borisyuk
Institute of Hydromechanics of the National Academy of Sciences of Ukraine, Zhelyabov Str., 8/4, 03680, Kyiv-180, MSP, Ukraine

要約

Particular cases of the theory of noise generation by a limited region of disturbed flow in an infinite straight rigid channel of circular cross-section, which has been developed earlier, are considered. In these cases the situations are studied when the contributions made either by volume quadrupoles or surface dipoles dominate in generated acoustic field. Those flows and shapes of the channel local geometrical inhomogeneities are of interest, that results in large or small eddies distributed uniformly in the disturbed flow region behind the inhomogeneity. The corresponding simplified expressions for the acoustic power generated are obtained in the considered cases, and their estimates are carried out for the characteristic scales in the disturbed flow region.