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Numerical simulation of flow-induced sound generation from an orifice 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. KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx).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.
2011 (English)In: 17th AIAA/CEAS Aeroacoustics Conference (32nd AIAA Aeroacoustics Conference), 2011Conference 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. The flow field is calculated by solving the filtered Navier-Stokes equations by means of direct numerical simulation (DNS), 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. Both the scattering of the sound (passive part) as well as the sound generation (active part) are studied in the low frequency plane wave range. An acoustic two-port model is applied to describe the sound in the duct. The results are compared with experimental data for the same configuration. The efficiency and robustness of the numerical technique are also examined.

Place, publisher, year, edition, pages
2011.
Series
17th AIAA/CEAS Aeroacoustics Conference 2011 (32nd AIAA Aeroacoustics Conference)
Keyword [en]
Aero-acoustic simulation, Filtered Navier-Stokes equations, Finite difference operators, High-order finite differences, Low Mach numbers, Numerical techniques, Simultaneous approximation, Summation-by-parts, Acoustic generators, Aeroacoustics, Aerodynamics, Computer simulation, Navier Stokes equations, Orifices, Mach number
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-148675DOI: 10.2514/6.2011-2894Scopus ID: 2-s2.0-84883111306ISBN: 9781600869433 (print)OAI: oai:DiVA.org:kth-148675DiVA: diva2:750132
Conference
17th AIAA/CEAS Aeroacoustics Conference 2011 (32nd AIAA Aeroacoustics Conference), 5 June 2011 through 8 June 2011, Portland, OR, United States
Note

QC 20140926

Available from: 2014-09-26 Created: 2014-08-11 Last updated: 2016-09-05Bibliographically approved

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

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Aeronautical and Vehicle EngineeringLinné Flow Center, FLOWCompetence Center for Gas Exchange (CCGEx)
Fluid Mechanics and Acoustics

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