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Twin Impinging Jets Through a Crossflow

2012-11-06Journal article Embargoed access
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dc.contributor.authorBarata, Jorge M M
dc.contributor.authorNeves, Fernando M. S. P.
dc.contributor.authorVieira, Diana
dc.contributor.authorSilva, André
dc.date.accessioned2022-04-07T08:25:27Z
dc.date.embargo2060-11-06
dc.date.issued2012-11-06
dc.description.abstractLaser Doppler measurements provide information on the flowfield created by twin impinging jets aligned with a low velocity crossflow. The experiments were carried out for a Reynolds number based on the jet exit conditions of Re j=4.3×104, an impingement height of 20.1 jet diameters and for a velocity ratio between the jet exit and the crossflow V R=Vj/Uo of 22.5, and an interjet spacing of S=6D. The results show a large penetration of the first (upstream) jet that is deflected by the crossflow and impinges on the ground, giving rise to a ground vortex due to the collision of the radial wall and the crossflow that wraps around the impinging point like a scarf. The second jet (located downstream) it is not so affected by the crossflow in terms of deflection, but due to the downstream wall jet that flows radially from the impinging point of the first jet it does not reach the ground. The results indicate a new flow pattern not yet reported so far, that for a VSTOL aircraft operating in ground vicinity with front wind or small forward movement may result in enhanced under pressures in the aft part of the aircraft causing a suction down force and a change of the pitching moment towards the ground.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., Neves, F.M.S.P., Vieira, D.F., Silva, A.R.R. Twin Impinging Jets Through a Crossflow 50th Aerospace Sciences Meeting, Nashville, Tennessee, EUA, 9-12 janeiro, 2012 DOI: 10.2514/6.2012-1219pt_PT
dc.identifier.doi10.2514/6.2012-1219pt_PT
dc.identifier.isbn978-1-60086-936-5
dc.identifier.urihttp://hdl.handle.net/10400.6/12182
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAmerican Institute of Aeronautics and Astronautics Incpt_PT
dc.relation.publisherversionhttps://arc.aiaa.org/doi/10.2514/6.2012-1219pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectHorseshoe Vortexpt_PT
dc.subjectPitching Momentpt_PT
dc.subjectFlow Conditionspt_PT
dc.subjectFlow Characteristicspt_PT
dc.subjectShear Layerspt_PT
dc.subjectNormal Stresspt_PT
dc.subjectWind Tunnelspt_PT
dc.subjectFlow Visualizationpt_PT
dc.subjectPitot Probespt_PT
dc.subjectDoppler Broadeningpt_PT
dc.titleTwin Impinging Jets Through a Crossflowpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceNashville, Tennesseept_PT
oaire.citation.title50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Expositionpt_PT
person.familyNameMartins Barata
person.familyNameSilva Pereira das Neves
person.familyNameVieira
person.familyNameResende Rodrigues da Silva
person.givenNameJorge Manuel
person.givenNameFernando Manuel da
person.givenNameDiana
person.givenNameAndré
person.identifierhFY_5JYAAAAJ&hl
person.identifierJ-4185-2012
person.identifier.ciencia-idF611-BBCC-DAA8
person.identifier.ciencia-idBC15-D534-3DCC
person.identifier.ciencia-idC410-A26E-8F83
person.identifier.ciencia-id8219-4B2B-E1C7
person.identifier.orcid0000-0001-9014-5008
person.identifier.orcid0000-0002-5826-7459
person.identifier.orcid0000-0003-0411-5270
person.identifier.orcid0000-0002-4901-7140
person.identifier.scopus-author-id11439470600
person.identifier.scopus-author-id55252408000
person.identifier.scopus-author-id11440407500
rcaap.embargofct© 2012 by the American Institute of Aeronautics and Astronautics, Inc.pt_PT
rcaap.rightsembargoedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication908e150d-3890-457c-b5da-09c84671cb93
relation.isAuthorOfPublication.latestForDiscovery4f84a2ce-0a92-475b-9a13-87b26a6b1109

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