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A wave expansion method for acoustic propagation in lined flow ducts
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0003-0176-5358
2015 (English)In: Applied Acoustics, ISSN 0003-682x, Vol. 90, 54-63 p.Article in journal (Refereed) Published
Abstract [en]

Acoustic liners are used extensively in engineering applications, particularly in aero-engines and automotive exhaust systems. In this paper, a flow impedance boundary conditions is introduced into the wave expansion method with the aim of providing an efficient methodology for computing the acoustic propagation through a lined duct with flow. For a potential flow, the boundary layer and the lined wall are included in the discretisation scheme by the Myers flow impedance boundary condition. The acoustic propagation through a flow impedance tube is computed in order to validate the implementation of the impedance boundary condition in this scheme. The results show that this computationally light methodology provides generally good agreement with the experimental data.

Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 90, 54-63 p.
Keyword [en]
Acoustic liner, Flow impedance boundary condition, Frequency-domain propagation, Wave expansion method
National Category
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-159507DOI: 10.1016/j.apacoust.2014.10.015ISI: 000349588200006ScopusID: 2-s2.0-84913529798OAI: diva2:785379

QC 20150203

Available from: 2015-02-02 Created: 2015-02-02 Last updated: 2016-04-18Bibliographically approved

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The full text will be freely available from 2016-11-27 05:00
Available from 2016-11-27 05:00

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