Helicopter rotor noise in the merged tip-vortex and blade interaction condition

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dc.contributor.authorWie, Seong-Yongko
dc.contributor.authorIm, Dong-Kyunko
dc.contributor.authorKwon, Jang-Hyukko
dc.contributor.authorLee, Duck-Jooko
dc.contributor.authorChung, K. H.ko
dc.contributor.authorKim, S. B.ko
dc.date.accessioned2013-03-09T19:11:01Z-
dc.date.available2013-03-09T19:11:01Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2011-
dc.identifier.citationINTERNATIONAL JOURNAL OF AEROACOUSTICS, v.10, pp.427 - 442-
dc.identifier.issn1475-472X-
dc.identifier.urihttp://hdl.handle.net/10203/97237-
dc.description.abstractBVI (blade vortex interaction) phenomena cause unsteady loading and noise in the helicopter rotor. It is difficult to accurately predict BVI aerodynamics and noise, because rotor wake and tip-vortices are numerically dissipated. In the present study, CFD and a time-marching free-wake coupling analysis were used to describe inflow and outflow without wake dissipation. Rotor noise was also computed using the Farassat formula, derived from the Ffowcs-Williams Hawkings equation. To validate aerodynamics and the noise prediction solver, a two-blade rotor was simulated and the results were compared with experimental data. To investigate the vortex interaction of a multi-blade rotor, a four-blade rotor was also simulated. In a slow descent flight condition, tip vortices are merged at the advancing side. The merged tip-vortex and blade interaction were simulated and are discussed in this paper.-
dc.languageEnglish-
dc.publisherMULTI-SCIENCE PUBL CO LTD-
dc.subjectSCHEMES-
dc.subjectCOMPUTATIONS-
dc.subjectCONSERVATION-
dc.subjectSOUND-
dc.titleHelicopter rotor noise in the merged tip-vortex and blade interaction condition-
dc.typeArticle-
dc.identifier.wosid000291186300003-
dc.identifier.scopusid2-s2.0-79959360969-
dc.type.rimsART-
dc.citation.volume10-
dc.citation.beginningpage427-
dc.citation.endingpage442-
dc.citation.publicationnameINTERNATIONAL JOURNAL OF AEROACOUSTICS-
dc.contributor.localauthorKwon, Jang-Hyuk-
dc.contributor.localauthorLee, Duck-Joo-
dc.contributor.nonIdAuthorChung, K. H.-
dc.contributor.nonIdAuthorKim, S. B.-
dc.type.journalArticleArticle-
dc.subject.keywordPlusSCHEMES-
dc.subject.keywordPlusCOMPUTATIONS-
dc.subject.keywordPlusCONSERVATION-
dc.subject.keywordPlusSOUND-
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