Streamwise counter-rotating vortices generated by triangular leading edge pattern in flat plate boundary layer

Handle URI:
http://hdl.handle.net/10754/596894
Title:
Streamwise counter-rotating vortices generated by triangular leading edge pattern in flat plate boundary layer
Authors:
Hasheminejad, S. M.; Mitsudharmadi, Hatsari ( 0000-0001-6575-1217 ) ; Winoto, S. H.; Lua, K. B.; Low, H. T.
Abstract:
A series of flow visualizations were conducted to qualitatively study the development of streamwise counter-rotating vortices over a flat plate induced by triangular patterns at the leading edge of a flat plate. The experiments were carried out for a Reynolds number based on the pattern wavelength (λ) of 3080. The results depict the onset, development and breakdown of the vortical structures within the flat plate boundary layer. Moreover, the effect of one spanwise array of holes with diameter of 0.2λ (=3 mm) was examined. This investigation was done on two different flat plates with holes placed at the location x/λ = 2 downstream of the troughs and peaks. The presence of holes after troughs does not show any significant effect on the vortical structures. However, the plate with holes after peaks noticeably delays the vortex breakdown. In this case, the “mushroom-like” vortices move away from the wall and propagate downstream with stable vortical structures. The vortex growth is halted further downstream but start to tilt aside.
KAUST Department:
Reactive Flow Modeling Laboratory Group; Clean Combustion Research Center
Citation:
Streamwise counter-rotating vortices generated by triangular leading edge pattern in flat plate boundary layer 2016 Journal of Visualization
Publisher:
Springer Nature
Journal:
Journal of Visualization
Issue Date:
5-Jan-2016
DOI:
10.1007/s12650-015-0333-7
Type:
Article
ISSN:
1343-8875; 1875-8975
Sponsors:
The authors would like to thank all the laboratory technologists in the Fluid Mechanics Laboratory, Department of Mechanical Engineering, National University of Singapore for their help in conducting the experiments and also Dr. Yann Bouremel of Institute of Ophthalmology, University College, London, UK for his help and advice in flow visualization.
Additional Links:
http://link.springer.com/10.1007/s12650-015-0333-7
Appears in Collections:
Articles; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorHasheminejad, S. M.en
dc.contributor.authorMitsudharmadi, Hatsarien
dc.contributor.authorWinoto, S. H.en
dc.contributor.authorLua, K. B.en
dc.contributor.authorLow, H. T.en
dc.date.accessioned2016-02-22T07:12:25Zen
dc.date.available2016-02-22T07:12:25Zen
dc.date.issued2016-01-05en
dc.identifier.citationStreamwise counter-rotating vortices generated by triangular leading edge pattern in flat plate boundary layer 2016 Journal of Visualizationen
dc.identifier.issn1343-8875en
dc.identifier.issn1875-8975en
dc.identifier.doi10.1007/s12650-015-0333-7en
dc.identifier.urihttp://hdl.handle.net/10754/596894en
dc.description.abstractA series of flow visualizations were conducted to qualitatively study the development of streamwise counter-rotating vortices over a flat plate induced by triangular patterns at the leading edge of a flat plate. The experiments were carried out for a Reynolds number based on the pattern wavelength (λ) of 3080. The results depict the onset, development and breakdown of the vortical structures within the flat plate boundary layer. Moreover, the effect of one spanwise array of holes with diameter of 0.2λ (=3 mm) was examined. This investigation was done on two different flat plates with holes placed at the location x/λ = 2 downstream of the troughs and peaks. The presence of holes after troughs does not show any significant effect on the vortical structures. However, the plate with holes after peaks noticeably delays the vortex breakdown. In this case, the “mushroom-like” vortices move away from the wall and propagate downstream with stable vortical structures. The vortex growth is halted further downstream but start to tilt aside.en
dc.description.sponsorshipThe authors would like to thank all the laboratory technologists in the Fluid Mechanics Laboratory, Department of Mechanical Engineering, National University of Singapore for their help in conducting the experiments and also Dr. Yann Bouremel of Institute of Ophthalmology, University College, London, UK for his help and advice in flow visualization.en
dc.language.isoenen
dc.publisherSpringer Natureen
dc.relation.urlhttp://link.springer.com/10.1007/s12650-015-0333-7en
dc.rightsThe final publication is available at Springer via http://dx.doi.org/10.1007/s12650-015-0333-7en
dc.subjectLeading edge patternen
dc.subjectStreamwise counter-rotating vorticesen
dc.subjectSmoke-wire flow visualizationen
dc.subjectFlat plate boundary layeren
dc.titleStreamwise counter-rotating vortices generated by triangular leading edge pattern in flat plate boundary layeren
dc.typeArticleen
dc.contributor.departmentReactive Flow Modeling Laboratory Groupen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalJournal of Visualizationen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Mechanical Engineering, National University of Singapore, Kent Ridge, Singapore, Singaporeen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorMitsudharmadi, Hatsarien
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