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Numerical simulation of flow-induced sound generation from an orifice in a low Mach number ducted flow
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg. KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW.ORCID-id: 0000-0003-0176-5358
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg. KTH, Skolan för industriell teknik och management (ITM), Centra, Competence Center for Gas Exchange (CCGEx).ORCID-id: 0000-0002-4156-8976
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg. KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW.ORCID-id: 0000-0002-9061-4174
University of Illinois Urbana-Champaign, USA.
2011 (Engelska)Ingår i: 17th AIAA/CEAS Aeroacoustics Conference (32nd AIAA Aeroacoustics Conference), 2011Konferensbidrag, Publicerat paper (Övrigt vetenskapligt)
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.

Ort, förlag, år, upplaga, sidor
2011.
Serie
17th AIAA/CEAS Aeroacoustics Conference 2011 (32nd AIAA Aeroacoustics Conference)
Nyckelord [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
Nationell ämneskategori
Strömningsmekanik och akustik
Identifikatorer
URN: urn:nbn:se:kth:diva-148675DOI: 10.2514/6.2011-2894Scopus ID: 2-s2.0-84883111306ISBN: 9781600869433 (tryckt)OAI: oai:DiVA.org:kth-148675DiVA, id: diva2:750132
Konferens
17th AIAA/CEAS Aeroacoustics Conference 2011 (32nd AIAA Aeroacoustics Conference), 5 June 2011 through 8 June 2011, Portland, OR, United States
Anmärkning

QC 20140926

Tillgänglig från: 2014-09-26 Skapad: 2014-08-11 Senast uppdaterad: 2016-09-05Bibliografiskt granskad

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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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Farkost och flygLinné Flow Center, FLOWCompetence Center for Gas Exchange (CCGEx)
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