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Aero-acoustic source analysis of landing gear noise via dynamic mode decomposition
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Aerodynamics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-0856-8181
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Aerodynamics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-3194-5141
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0003-0176-5358
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Aerodynamics.ORCID iD: 0000-0002-9061-4174
2014 (English)In: 21st International Congress on Sound and Vibration, ICSV21: / [ed] Malcolm J. Crocker, Marek Pawelczyk, Jing Tian, 2014, Vol. 2, p. 1245-1252Conference paper, Published paper (Refereed)
Abstract [en]

In this paper, we apply dynamic mode decomposition (DMD) on time accurate simulationsof the pressure distribution on a realistic full-scale noselanding gear configuration in order toidentify noise generating structures on landing gear surfaces. The simulated pressure data isobtained from DES simulations using the commercial software STAR-CCM+ by CD-adapco.The dynamics of the surface pressure on a tyre are discussed and the DMD modes are com-puted from instantaneous pressure snapshots. The far-fieldnoise is determined via the FfowcsWilliams-Hawkings analogy, where a given frequency band source term can be reconstructedby choosing an appropriate number of DMD modes.

Place, publisher, year, edition, pages
2014. Vol. 2, p. 1245-1252
Keywords [en]
airframe noise, dynamic mode decomposition, landing gear, ffowcs williams hawkings, acoustic analogy
National Category
Fluid Mechanics and Acoustics
Research subject
Vehicle and Maritime Engineering; Aerospace Engineering
Identifiers
URN: urn:nbn:se:kth:diva-156244Scopus ID: 2-s2.0-84922679262ISBN: 978-616-551-682-2 (print)OAI: oai:DiVA.org:kth-156244DiVA, id: diva2:766000
Conference
21st International Congress on Sound and Vibration, Beijing, China
Projects
ALLEGRA
Funder
EU, FP7, Seventh Framework Programme
Note

QC 20150209. QC 20160115

Available from: 2014-11-25 Created: 2014-11-25 Last updated: 2016-01-15Bibliographically approved

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Scopushttp://www.icsv21.org/content/papers/papers/full_paper_221_20140402145649114.pdf

Authority records BETA

Dahan, JeremyFutrzynski, RomainO'Reilly, CiaránEfraimsson, Gunilla

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Dahan, JeremyFutrzynski, RomainO'Reilly, CiaránEfraimsson, Gunilla
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