A CFD-BEM coupling technique for low mach number flow induced noise

P. Croaker, N. Kessissoglou, S. Marburg

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

A technique to couple computational fluid dynamics (CFD) and boundary element method (BEM) models is proposed that allows the total sound pressure field produced by low Mach number flow past a rigid body to be predicted. An incompressible CFD solver is used to calculate the transient hydrodynamic flow field. Acoustic sources based on Lighthill's analogy are then extracted from the flow field data. The CFD/BEM coupling technique is used to compute the acoustic field incident on the body. The incident acoustic field is calculated based on a near-field solution of Lighthill's analogy, which employs numerical techniques to accurately evaluate singular and near-singular integrals. This incident field is combined with a BEM model of the cylinder to predict the scattered sound pressure field. The results from this CFD/BEM coupling technique are presented for flow past a circular cylinder with Reynolds number, Re D=100 and Mach number, M=0.02. The directivity of the sound pressure field at the vortex shedding frequency is compared with results of alternate methods available in the literature.

Original languageEnglish
Title of host publicationAnnual Conference of the Australian Acoustical Society 2013, Acoustics 2013
Subtitle of host publicationScience, Technology and Amenity
PublisherAustralian Acoustical Society
Pages31-36
Number of pages6
ISBN (Print)9781632662682
StatePublished - 2013
Externally publishedYes
EventAnnual Conference of the Australian Acoustical Society 2013: Science, Technology and Amenity, Acoustics 2013 - Victor Harbor, SA, Australia
Duration: 17 Nov 201320 Nov 2013

Publication series

NameAnnual Conference of the Australian Acoustical Society 2013, Acoustics 2013: Science, Technology and Amenity

Conference

ConferenceAnnual Conference of the Australian Acoustical Society 2013: Science, Technology and Amenity, Acoustics 2013
Country/TerritoryAustralia
CityVictor Harbor, SA
Period17/11/1320/11/13

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