An experimental study of large-scale vortices a blunt-faced flat plate in pulsating flow

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dc.contributor.authorHyun, Jae Minko
dc.contributor.authorSung, Hyung Jinko
dc.contributor.authorHwang, KSko
dc.date.accessioned2009-11-30T01:38:38Z-
dc.date.available2009-11-30T01:38:38Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2001-02-
dc.identifier.citationEXPERIMENTS IN FLUIDS, v.30, no.2, pp.202 - 213-
dc.identifier.issn0723-4864-
dc.identifier.urihttp://hdl.handle.net/10203/13631-
dc.description.abstractLaboratory measurements are made of flow over a blunt flat plate of finite thickness, which is placed in a pulsating free stream, U = U-0(1 + A(0) cos 2 pif(p)t). Low turbulence-intensity wind tunnel experiments are conducted in the ranges of St(p) less than or equal to 1.23 and A(0) < 0.118 at Re-H = 560. Pulsation is generated by means of a woofer speaker. Variations of the time-mean reattachment length x(R) as functions of Stp and A, are scrutinized by using the forward-time fraction and surface pressure distributions (C-p). The shedding frequency of large-scale vortices due to pulsation is measured. Flow visualizations depict the behavior of large-scale vortices. The results for non-pulsating flows (A(0) = 0) are consistent with the published data.. In the lower range of A(x), as St(p) increases, x(R) attains a minimum value at a particular pulsation frequency. Far large A(0), the results show complicated behaviors of x(R) For St(p) <greater than or equal to> 0.80, changes in x(R) are insignificant as A(0) increases. The shedding frequency of large-scale vortices is locked-in to the pulsation frequency. A vortex-pairing process takes place between two neighboring large-scale vortices in the separated shear layer.-
dc.languageEnglish-
dc.language.isoen_USen
dc.publisherSPRINGER-VERLAG-
dc.subjectTURBULENT SEPARATION BUBBLE-
dc.subjectMASS-TRANSFER-
dc.subjectREATTACHMENT-
dc.titleAn experimental study of large-scale vortices a blunt-faced flat plate in pulsating flow-
dc.typeArticle-
dc.identifier.wosid000166914600009-
dc.identifier.scopusid2-s2.0-0035243298-
dc.type.rimsART-
dc.citation.volume30-
dc.citation.issue2-
dc.citation.beginningpage202-
dc.citation.endingpage213-
dc.citation.publicationnameEXPERIMENTS IN FLUIDS-
dc.embargo.liftdate9999-12-31-
dc.embargo.terms9999-12-31-
dc.contributor.localauthorHyun, Jae Min-
dc.contributor.localauthorSung, Hyung Jin-
dc.contributor.nonIdAuthorHwang, KS-
dc.type.journalArticleArticle-
dc.subject.keywordPlusTURBULENT SEPARATION BUBBLE-
dc.subject.keywordPlusMASS-TRANSFER-
dc.subject.keywordPlusREATTACHMENT-
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