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Aeroacoustics of rectangular T-junctions subject to combined grazing and bias flows - An experimental investigation
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, MWL Marcus Wallenberg Laboratoriet. KTH, Skolan för industriell teknik och management (ITM), Centra, Competence Center for Gas Exchange (CCGEx). KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW.
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, MWL Marcus Wallenberg Laboratoriet. KTH, Skolan för industriell teknik och management (ITM), Centra, Competence Center for Gas Exchange (CCGEx). KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW.ORCID-id: 0000-0001-7898-8643
2013 (engelsk)Inngår i: 19th AIAA/CEAS Aeroacoustics Conference, 2013Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Experimentally determined scattering matrices are used to study the low-amplitude interaction between the acoustic and the hydrodynamic fields in a T-junction of rectangular ducts. In particular, combinations of grazing and bias flows are investigated in the study. Common for all flow combinations is that waves incident on the junction at the downstream side are only attenuated, while waves incident at the other branches may be amplified or attenuated, depending on the Strouhal number. When bias in-flow is introduced to a grazing flow, there is first an increase and then a decrease in both amplification and attenuation, as the bias in-flow Mach number is increased. Comparing with T junctions of circular ducts, the interaction is stronger for rectangular duct junctions.

sted, utgiver, år, opplag, sider
2013.
Emneord [en]
Circular ducts, Experimental investigations, Grazing flows, Hydrodynamic field, Low-amplitude, Rectangular ducts, Scattering matrices, T junctions
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-133370Scopus ID: 2-s2.0-84883667731ISBN: 978-162410213-4 (tryckt)OAI: oai:DiVA.org:kth-133370DiVA, id: diva2:661954
Konferanse
19th AIAA/CEAS Aeroacoustics Conference; Berlin; Germany; 27 May 2013 through 29 May 2013
Merknad

QC 20131105

Tilgjengelig fra: 2013-11-05 Laget: 2013-10-31 Sist oppdatert: 2013-11-05bibliografisk kontrollert

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Totalt: 204 treff
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