Open Access System for Information Sharing

Login Library

 

Article
Cited 96 time in webofscience Cited 129 time in scopus
Metadata Downloads
Full metadata record
Files in This Item:
There are no files associated with this item.
DC FieldValueLanguage
dc.contributor.authorLim, HC-
dc.contributor.authorLee, SJ-
dc.date.accessioned2016-03-31T13:00:56Z-
dc.date.available2016-03-31T13:00:56Z-
dc.date.created2009-03-19-
dc.date.issued2002-10-
dc.identifier.issn0001-1452-
dc.identifier.other2002-OAK-0000002929-
dc.identifier.urihttps://oasis.postech.ac.kr/handle/2014.oak/18878-
dc.description.abstractFlow around circular cylinders with different grooved surfaces (U and V shaped) was investigated experimentally. The drag force, mean velocity, and turbulence intensity profiles of the wake behind the cylinders were measured for Reynolds numbers based on the cylinder diameter (D = 60 mm) in the range Re-D = 8 x 10(3) similar to 1.4 x 10(5). Flow around the cylinders was visualized using a particle tracer technique to see the flow structure qualitatively. The results were compared with those for a smooth cylinder of the same diameter D. At ReD = 1.4 X 10(5), the U-type groove surface reduced the drag coefficient by 18.6% compared with the smooth cylinder, whereas the drag reduction of V-type grooves was only 2.5%. For the circular cylinder with a U-grooved surface, as the Reynolds number increases, the location of peak turbulence intensity moves downstream, and the turbulence intensity is decreased. The two longitudinal-grooved surfaces tested in this study show different surface pressure distributions at high Reynolds numbers due to their different flow structures near the cylinder surface. Flow visualization results show that the U-grooved cylinder elongates the vortex formation region more than 50% compared with the smooth cylinder. This is consistent with the results of turbulence intensity distribution measured along the wake centerline. The large-scale longitudinal vortices formed behind the grooved cylinders seem to be broken into smaller ones due to the existence of longitudinal grooves. On average, the scale of longitudinal vortices behind the U-grooved cylinder is much smaller in size compared with the other two cases.-
dc.description.statementofresponsibilityX-
dc.languageEnglish-
dc.publisherAMER INST AERONAUT ASTRONAUT-
dc.relation.isPartOfAIAA JOURNAL-
dc.titleFlow control of circular cylinders with longitudinal grooved surfaces-
dc.typeArticle-
dc.contributor.college기계공학과-
dc.identifier.doi10.2514/2.1535-
dc.author.googleLim, HC-
dc.author.googleLee, SJ-
dc.relation.volume40-
dc.relation.issue10-
dc.relation.startpage2027-
dc.relation.lastpage2036-
dc.contributor.id10054593-
dc.relation.journalAIAA JOURNAL-
dc.relation.indexSCI급, SCOPUS 등재논문-
dc.relation.sciSCI-
dc.collections.nameJournal Papers-
dc.type.rimsART-
dc.identifier.bibliographicCitationAIAA JOURNAL, v.40, no.10, pp.2027 - 2036-
dc.identifier.wosid000178420200014-
dc.date.tcdate2019-01-01-
dc.citation.endPage2036-
dc.citation.number10-
dc.citation.startPage2027-
dc.citation.titleAIAA JOURNAL-
dc.citation.volume40-
dc.contributor.affiliatedAuthorLee, SJ-
dc.identifier.scopusid2-s2.0-0036806017-
dc.description.journalClass1-
dc.description.journalClass1-
dc.description.wostc27-
dc.type.docTypeArticle-
dc.relation.journalWebOfScienceCategoryEngineering, Aerospace-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.relation.journalResearchAreaEngineering-

qr_code

  • mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher

이상준LEE, SANG JOON
Dept of Mechanical Enginrg
Read more

Views & Downloads

Browse