DC Field | Value | Language |
---|---|---|
dc.contributor.author | Yoon, BK | ko |
dc.contributor.author | Chung, Myung Kyoon | ko |
dc.contributor.author | Park, Seung O | ko |
dc.date.accessioned | 2013-03-03T00:59:45Z | - |
dc.date.available | 2013-03-03T00:59:45Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 1997-08 | - |
dc.identifier.citation | AERONAUTICAL JOURNAL, v.101, no.1007, pp.335 - 345 | - |
dc.identifier.issn | 0001-9240 | - |
dc.identifier.uri | http://hdl.handle.net/10203/76370 | - |
dc.description.abstract | A comparative study is made on the performance of several low Reynolds number k-epsilon models and the k-omega model in predicting the shockwave-turbulent-boundary layer interaction over a supersonic compression ramp of 16 degrees, 20 degrees and 24 degrees at a Mach numbers of 2.85, 2.79 and 2.84, respectively. The model equations are numerically solved by a higher order upwind scheme with the 3rd order MUSCL type TVD. The computational results reveal that all of the low Reynolds number k-epsilon models, particularly those employing y+ in their damping functions give erroneously large skin friction in the redeveloping region. It is also interesting to note that the k-epsilon models, when adjusted and based on DNS data, do not perform better, as expected, than the conventional low Reynolds number k-epsilon models. The k-omega model which does not adopt a low Reynolds number modification, brings about reasonably accurate skin friction, but with a later onset of pressure rise. By recasting the omega equation into the general form of the epsilon equation, it is inferred that the turbulent cross diffusion term between k and epsilon is critical to guarantee better performance of the k-omega model for the skin friction prediction in the redeveloping region. Finally, an asymptotic analysis of a fully developed incompressible channel flow, with the k-epsilon and the k-omega models, reveals that the cross diffusion mechanism inherent in the k-omega model contributes to the better performance of the k-omega model. | - |
dc.language | English | - |
dc.publisher | ROYAL AERONAUTICAL SOC | - |
dc.title | Comparisons between low Reynolds number two-equation models for computation of a shockwave-turbulent-boundary layer interaction | - |
dc.type | Article | - |
dc.identifier.wosid | A1997YD76100007 | - |
dc.identifier.scopusid | 2-s2.0-0031197708 | - |
dc.type.rims | ART | - |
dc.citation.volume | 101 | - |
dc.citation.issue | 1007 | - |
dc.citation.beginningpage | 335 | - |
dc.citation.endingpage | 345 | - |
dc.citation.publicationname | AERONAUTICAL JOURNAL | - |
dc.contributor.localauthor | Chung, Myung Kyoon | - |
dc.contributor.localauthor | Park, Seung O | - |
dc.contributor.nonIdAuthor | Yoon, BK | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | K-EPSILON MODEL | - |
dc.subject.keywordPlus | NEAR-WALL TURBULENCE | - |
dc.subject.keywordPlus | FLOWS | - |
dc.subject.keywordPlus | WAVE | - |
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