공동을 지나는 비정상 유동에 의한 소음 방사 해석Numerical Investigation of Sound Generation in the Flow Past a Cavity

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dc.contributor.author허대영-
dc.contributor.author이덕주-
dc.date.accessioned2013-03-16T23:13:47Z-
dc.date.available2013-03-16T23:13:47Z-
dc.date.created2012-02-06-
dc.date.issued2000-06-22-
dc.identifier.citation창립10주년기념 소음진동학술대회 , v., no., pp.104 - 109-
dc.identifier.urihttp://hdl.handle.net/10203/137109-
dc.description.abstractThe modes of oscillation and radiated acoustic fields of compressible flows over open cavities are investigated computationally. The compressible Navier-Stokes equations are solved for two-dimensional cavities with laminar boundary layers upstream. The high-order and high-resolution numerical schemes are used for the evaluation of spatial derivatives and the time integration. Physically correct numerical boundary conditions are implemented to produce time-accurate solutions in the whole computation domain. The computational domain is large enough to directly resolve a portion of the radiated acoutic field. The results show a transition from a shear layer mode, for shorter cavities and lower Mach numbers, to a wake mode for longer cavities and higher Mach numbers. The shear layer mode is well characterized by Rossiter modes and these oscillations lead to intense upstream acoustic radiation dominated by a single frequency. The wake mode is characterized instead by a large-scale vortex shedding. Acoustic radiation is more intense, with multiple frequencies present.-
dc.languageKOR-
dc.publisher한국소음진동공학회-
dc.title공동을 지나는 비정상 유동에 의한 소음 방사 해석-
dc.title.alternativeNumerical Investigation of Sound Generation in the Flow Past a Cavity-
dc.typeConference-
dc.type.rimsCONF-
dc.citation.beginningpage104-
dc.citation.endingpage109-
dc.citation.publicationname창립10주년기념 소음진동학술대회-
dc.identifier.conferencecountrySouth Korea-
dc.identifier.conferencecountrySouth Korea-
dc.contributor.localauthor이덕주-
dc.contributor.nonIdAuthor허대영-
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AE-Conference Papers(학술회의논문)
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