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Behavior of intense acoustic noise at large distances
KTH, School of Engineering Sciences (SCI), Mechanics.
2007 (English)In: Acoustical Physics, ISSN 1063-7710, E-ISSN 1562-6865, Vol. 53, no 1, 48-63 p.Article in journal (Refereed) Published
Abstract [en]

Propagation of intense acoustic noise waves is investigated in the case of a nonplanar geometry. It is shown that, at large distances from the source, where the nonlinear effects become negligible, the spectrum of such waves has a universal self-similar shape. The amplitude of the spectrum is determined by a single constant D-infinity= D-infinity(epsilon, R-0) (the spectrum steepness at zero-valued argument) whose value depends on two dimensionless parameters: the inverse acoustic Reynolds number epsilon and the dimensionless radius R-0. It is shown that the plane of dimensionless parameters (epsilon, R-0) can be divided into four regions, so that, within each of them, the quantity D-infinity is described by a universal function of these parameters. The numerical factors of these parameters are found from numerical simulations.

Place, publisher, year, edition, pages
2007. Vol. 53, no 1, 48-63 p.
Keyword [en]
43, 25, -x, 47, 27, Eq
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-37026DOI: 10.1134/S106377100701006XISI: 000243396100006Scopus ID: 2-s2.0-33846142842OAI: oai:DiVA.org:kth-37026DiVA: diva2:431858
Available from: 2011-07-26 Created: 2011-07-26 Last updated: 2017-12-08Bibliographically approved

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