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A Lighthill based jet noise model for acoustic shielding prediction
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, Aeroakustik. KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW.ORCID-id: 0000-0003-0176-5358
Trinity College, Dublin, Ireland.
2010 (Engelska)Ingår i: 17th International Congress on Sound and Vibration, ICSV17: Volume 1, 2010, s. 558-565Konferensbidrag, Publicerat paper (Övrigt vetenskapligt)
Abstract [en]

The majority of research on jet noise has considered isolated shear-flows and, as such, jet noise models based on Lighthill's acoustic analogy traditionally assume a free-space Green's function for propagation. In order to evaluate the reduction in jet noise attainable from proposed airframe shielding configurations, a jet noise model based on Lighthill's analogy is derived in this paper, which retains an explicit Green's function in the expression for the far-field spectral density. This Green's function may be evaluated to include the diffraction of the sound field about an acoustic shield. A preliminary comparison is made with the limited data available for shielded jets. In addition to facilitating the study of shielding configurations, isolated predictions made using this model compare favourably with isolated jet noise data.

Ort, förlag, år, upplaga, sidor
2010. s. 558-565
Nyckelord [en]
Acoustic analogy, Far-field, Jet noise, Limited data
Nationell ämneskategori
Strömningsmekanik och akustik
Identifikatorer
URN: urn:nbn:se:kth:diva-92294Scopus ID: 2-s2.0-84871419080ISBN: 978-161782255-1 (tryckt)OAI: oai:DiVA.org:kth-92294DiVA, id: diva2:513172
Konferens
17th International Congress on Sound and Vibration 2010, ICSV 2010; Cairo; Egypt; 18 July 2010 through 22 July 2010
Anmärkning

QC 20120809

Tillgänglig från: 2012-03-30 Skapad: 2012-03-30 Senast uppdaterad: 2016-04-25Bibliografiskt granskad

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Scopushttp://www.icsv17.org/index.html

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O'Reilly, Ciarán J.

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