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Aero-acoustic simulations of an orifice plate mounted in a low-Mach-number ducted flow
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0003-0176-5358
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Flow acoustics. KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx). KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-4156-8976
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-9061-4174
University of Illinois Urbana-Champaign, USA.
2012 (English)In: 18th AIAA/CEAS Aeroacoustics Conference (33rd AIAA Aeroacoustics Conference), 2012Conference paper, Published paper (Other academic)
Abstract [en]

Aero-acoustic simulations are performed for an orifice plate mounted in a straight duct in a low-Mach number flow. A two-dimensional flow-field is calculated by solv- ing the Navier-Stokes equations by means of a large-eddy simulation (LES), using a high-order finite difference scheme. The scheme uses summation-by-parts (SBP) finite difference operators with simultaneous approximation terms (SAT) to impose boundary conditions. The flow is decomposed using dynamic mode decomposition (DMD) in order to gain insight into the generation of sound by the flow. The frequency of the higher amplitude modes is shown to agree well the frequencies of the highest amplitude peaks in the power spectral density of the outgoing acoustic waves.

Place, publisher, year, edition, pages
2012.
Keyword [en]
A1. largeeddy simulations (LES), Aero-acoustic simulation, Dynamic mode decompositions, Finite difference operators, High-order finite differences, Orifice plate, Simultaneous approximation, Summation-by-parts
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-128991DOI: 10.2514/6.2012-2293Scopus ID: 2-s2.0-84880618566ISBN: 978-160086932-7 (print)OAI: oai:DiVA.org:kth-128991DiVA: diva2:649860
Conference
18th AIAA/CEAS Aeroacoustics Conference 2012 (33rd AIAA Aeroacoustics Conference); 4 June 2012 through 6 June 2012
Note

QC 20130919

Available from: 2013-09-19 Created: 2013-09-17 Last updated: 2016-09-05Bibliographically approved

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O'Reilly, Ciarán J.Alenius, EmmaEfraimsson, Gunilla

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O'Reilly, Ciarán J.Alenius, EmmaEfraimsson, Gunilla
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Aeronautical and Vehicle EngineeringLinné Flow Center, FLOWMWL Flow acousticsCompetence Center for Gas Exchange (CCGEx)
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