DC Field | Value | Language |
---|---|---|
dc.contributor.author | Chung, KH | ko |
dc.contributor.author | Kim, JW | ko |
dc.contributor.author | Ryu, KW | ko |
dc.contributor.author | Lee, KT | ko |
dc.contributor.author | Lee, Duck-Joo | ko |
dc.date.accessioned | 2008-08-13T08:53:44Z | - |
dc.date.available | 2008-08-13T08:53:44Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2006-06 | - |
dc.identifier.citation | AIAA JOURNAL, v.44, no.6, pp.1181 - 1187 | - |
dc.identifier.issn | 0001-1452 | - |
dc.identifier.uri | http://hdl.handle.net/10203/7088 | - |
dc.description.abstract | Sound generation and radiation from rotor tip-vortex pairing are calculated numerically. Wake geometries of a two-bladed rotor in axial flights are calculated using a time-marching free-wake method without a nonphysical model of the far wake. The acoustic field can be obtained using acoustic analogy. To show the accuracy of the flow calculation scheme, the tip-vortex geometries of the present calculation are compared with those done in the previous publication of a small-scaled rotor experiment. The accuracy of the vortex sound calculation scheme is validated by comparing its numerical and the analytic solution of circular vortex-ring interaction. The tip-vortex pairing consists of a turn of the tip-vortex from one blade rolling around the tip-vortex from the other blade. The tip-vortex pairing amplifies the noise and generates new dominant frequencies. The tip-vortex pairing noise has a quadrupole directivity pattern, and it is especially dominant in the direction of the rotation axis. The peak components of the noise spectrum represent the pairing period and an instability mode. | - |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | AMER INST AERONAUT ASTRONAUT | - |
dc.subject | VORTICES | - |
dc.subject | STABILITY | - |
dc.subject | RINGS | - |
dc.title | Sound generation and radiation from rotor tip-vortex pairing phenomenon | - |
dc.type | Article | - |
dc.identifier.wosid | 000238734100007 | - |
dc.identifier.scopusid | 2-s2.0-33746339918 | - |
dc.type.rims | ART | - |
dc.citation.volume | 44 | - |
dc.citation.issue | 6 | - |
dc.citation.beginningpage | 1181 | - |
dc.citation.endingpage | 1187 | - |
dc.citation.publicationname | AIAA JOURNAL | - |
dc.identifier.doi | 10.2514/1.22548 | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Lee, Duck-Joo | - |
dc.contributor.nonIdAuthor | Chung, KH | - |
dc.contributor.nonIdAuthor | Kim, JW | - |
dc.contributor.nonIdAuthor | Ryu, KW | - |
dc.contributor.nonIdAuthor | Lee, KT | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | VORTICES | - |
dc.subject.keywordPlus | STABILITY | - |
dc.subject.keywordPlus | RINGS | - |
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