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Experimental Study of Instabilities and Secondary Effects of a Ground Vortex Flow

2012-06-15Journal article Embargoed access
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dc.contributor.authorBarata, Jorge M M
dc.contributor.authorRibeiro, Samuel Dinis Galvão
dc.contributor.authorSantos, Pedro
dc.contributor.authorSilva, André
dc.contributor.authorSilvestre, M.A.R.
dc.date.accessioned2022-04-11T13:47:49Z
dc.date.embargo2060-06-19
dc.date.issued2012-06-15
dc.description.abstractLaser-Doppler measurements of velocity characteristics of the flowfield resulting from the collision of a wall jet with a boundary layer are presented and discussed together with visualization of the flow. The experiments have been carried out for boundary layer to wall jet velocity ratios of 0.5 and 0.58. Direct photography, digital film imaging, and mean and turbulent laser Doppler measurements were obtained to characterize this type of flows. For the present conditions the results revealed the existence of a small counter-rotating recirculating zone located upstream the separation point not yet reported before for this type of flows. The results show that this secondary vortex has a similar oscillating behavior observed in some configurations leading to ground vortex flows, where they are also probably present, but due the geometric and characteristic parameters could not be identified separately. A particular ordered sequence was recognized for the small recirculation zone, and can be confirmed by the bimodal histogram of the horizontal velocity measurements obtained. In spite of the apparent organized sequence of the turbulent structure of the collision zone, the power spectra measurements did not exhibit any evident particular peaks.pt_PT
dc.description.sponsorshipFundação para a Ciência e a Tecnologiapt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBarata, J.M.M., Ribeiro, S., Santos, P., Silva, A.R.R., Silvestre, M.A. Experimental Study of Instabilities and Secondary Effects of a Ground Vortex Flow 46th AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, EUA, 7-10 janeiro, 2008 DOI: 10.2514/6.2008-343pt_PT
dc.identifier.doi10.2514/6.2008-343pt_PT
dc.identifier.isbn978-1-62410-128-1
dc.identifier.isbn978-156347937-3
dc.identifier.urihttp://hdl.handle.net/10400.6/12204
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAmerican Institute of Aeronautics and Astronautics Incpt_PT
dc.relation.publisherversionhttps://arc.aiaa.org/doi/10.2514/6.2008-3923pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectVortex Flowpt_PT
dc.subjectNormal Strainpt_PT
dc.subjectVisualization of Flowpt_PT
dc.subjectHistogramspt_PT
dc.subjectShear Layerspt_PT
dc.subjectWind Tunnelspt_PT
dc.subjectAerodynamic Instabilitypt_PT
dc.subjectJet Flowpt_PT
dc.subjectTurbulence Intensitypt_PT
dc.subjectFlow Characteristicspt_PT
dc.titleExperimental Study of Instabilities and Secondary Effects of a Ground Vortex Flowpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceReno, Nevadapt_PT
oaire.citation.title46th AIAA Aerospace Sciences Meeting and Exhibitpt_PT
person.familyNameMartins Barata
person.familyNameResende Rodrigues da Silva
person.givenNameJorge Manuel
person.givenNameAndré
person.identifierhFY_5JYAAAAJ&hl
person.identifierJ-4185-2012
person.identifier.ciencia-idF611-BBCC-DAA8
person.identifier.ciencia-id8219-4B2B-E1C7
person.identifier.orcid0000-0001-9014-5008
person.identifier.orcid0000-0002-4901-7140
person.identifier.scopus-author-id11439470600
person.identifier.scopus-author-id11440407500
rcaap.embargofctCopyright © 2008 by American Institute of Aeronauticspt_PT
rcaap.rightsembargoedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationc4346556-933d-4f70-9b6d-8e1670d57be6
relation.isAuthorOfPublication908e150d-3890-457c-b5da-09c84671cb93
relation.isAuthorOfPublication.latestForDiscovery908e150d-3890-457c-b5da-09c84671cb93

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