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Scattering of Plane Waves by a Constriction
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, MWL Strömningsakustik. 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, MWL Strömningsakustik. KTH, Skolan för industriell teknik och management (ITM), Centra, Competence Center for Gas Exchange (CCGEx).ORCID-id: 0000-0001-7898-8643
KTH, Skolan för teknikvetenskap (SCI), Mekanik. KTH, Skolan för industriell teknik och management (ITM), Centra, Competence Center for Gas Exchange (CCGEx).
2011 (engelsk)Inngår i: Proceedings of ASME Turbo Expo 2011, Vol 7, Parts A-C, American Society Of Mechanical Engineers , 2011, s. 1043-1052Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Liner scattering of low frequency waves by an orifice plate has been studied using Large Eddy Simulation and an acoustic two-port model. The results have been compared to measurements with good agreement for waves coming from the downstream side. For waves coming from the upstream side the reflection is over-predicted, indicating that not enough of the acoustic energy is converted to vorticity at the upstream edge of the plate. Furthermore, the sensitivity to the amplitude of the acoustic waves has been studied, showing difficulties to simultaneously keep the amplitude low enough for linearity and high enough to suppress flow noise with the relatively short times series available in LES.

sted, utgiver, år, opplag, sider
American Society Of Mechanical Engineers , 2011. s. 1043-1052
Emneord [en]
Acoustic energy, Flow noise, Low-frequency waves, Orifice plate, Plane wave, Times series, Two-port models
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-72676ISI: 000321160300088Scopus ID: 2-s2.0-84865496527ISBN: 978-0-7918-5467-9 (tryckt)OAI: oai:DiVA.org:kth-72676DiVA, id: diva2:488431
Konferanse
ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition, GT2011; Vancouver, BC; Canada; 6 June 2011 through 10 June 2011
Merknad

QC 20140901

Tilgjengelig fra: 2012-02-01 Laget: 2012-02-01 Sist oppdatert: 2014-09-03bibliografisk kontrollert

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Alenius, EmmaÅbom, Mats

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Totalt: 1243 treff
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