DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Sang-Bong | ko |
dc.contributor.author | Seena, Abu | ko |
dc.contributor.author | Sung, Hyung-Jin | ko |
dc.date.accessioned | 2013-03-09T12:32:05Z | - |
dc.date.available | 2013-03-09T12:32:05Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2010-05 | - |
dc.identifier.citation | JOURNAL OF AIRCRAFT, v.47, pp.820 - 834 | - |
dc.identifier.issn | 0021-8669 | - |
dc.identifier.uri | http://hdl.handle.net/10203/96351 | - |
dc.description.abstract | Direct numerical and large eddy simulations of incompressible turbulent flows over deep and shallow cavies were performed in the range of 600 <= Re(D) <= 12, 000 to investigate the influence of the incoming turbulent boundary layer on self-sustained oscillations of the shear layer. When the turbulent boundary layer approached the open cavity with Re(D) = 3000, the energy spectra of the pressure fluctuations showed spectral peaks in the range of 0.15 <= omega <= 0.3. Conditionally averaged flowfields disclosed that the spectral peaks arise from the separation of high-speed streaky structures rather than from a geometric singularity of the cavity. The same spectral peaks were observed in a backward-facing step flow as well as in deep and shallow cavity flows, despite the different geometries of these systems. In the turbulent cavity flow of Re(D) = 12, 000, however, the peak frequencies of the energy spectra cavity lengths of L/D = land 2 were found to correspond to the Nth modes with N = 2 and 3, respectively. These modes were very similar to the frequency characteristics of self-sustained oscillations reported for laminar cavity flows. Inspection of instantaneous pressure fluctuations as well as spanwise-averaged pressure fluctuations reversed that regular shedding of quasi-two-dimensional vortical structures was responsible for the peak frequency in the energy spectra. | - |
dc.language | English | - |
dc.publisher | AMER INST AERONAUT ASTRONAUT | - |
dc.subject | COMPRESSIBLE FLOW | - |
dc.subject | BOUNDARY-LAYER | - |
dc.subject | NUMBER | - |
dc.subject | SIMULATION | - |
dc.subject | LAMINAR | - |
dc.title | Self-Sustained Oscillations of Turbulent Flow in an Open Cavity | - |
dc.type | Article | - |
dc.identifier.wosid | 000278831800009 | - |
dc.identifier.scopusid | 2-s2.0-77953165701 | - |
dc.type.rims | ART | - |
dc.citation.volume | 47 | - |
dc.citation.beginningpage | 820 | - |
dc.citation.endingpage | 834 | - |
dc.citation.publicationname | JOURNAL OF AIRCRAFT | - |
dc.identifier.doi | 10.2514/1.44823 | - |
dc.contributor.localauthor | Sung, Hyung-Jin | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | COMPRESSIBLE FLOW | - |
dc.subject.keywordPlus | BOUNDARY-LAYER | - |
dc.subject.keywordPlus | NUMBER | - |
dc.subject.keywordPlus | SIMULATION | - |
dc.subject.keywordPlus | LAMINAR | - |
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