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Numerical and Experimental Study of Two Impinging Jets in a Row through a Crossflow

2013-01-05Journal article Embargoed access
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dc.contributor.authorVieira, Diana
dc.contributor.authorSilva, André
dc.contributor.authorNeves, Fernando M. S. P.
dc.contributor.authorCarvalho, Pedro dos Santos Duarte
dc.contributor.authorBarata, Jorge M M
dc.date.accessioned2022-04-04T13:31:54Z
dc.date.embargo2060-01-05
dc.date.issued2013-01-05
dc.description.abstractAn experimental and numerical study is carried out to investigate the flowfield created by twin impinging jets aligned with a low velocity crossflow. The mean velocity, velocity fluctuation and visualization in the impingement region were obtained for a Reynolds number based on the jet exit conditions of Rej=4.3x104, an impingement height of 20.1 diameter and for a velocity ratios between the jet exit and the crossflow VR=Vj/Uo of 22.5, 33.7 and 43.8 with interject spacing, S of 6D. The experimental results show a large penetration of the first (upstream) impinging jet, giving rise to a ground vortex due to the collision of the radial wall jet 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 it does not reach the ground due to the downstream wall jet that flows radially from the impinging point of the first jet along the ground. The results indicate a new flow pattern not yet reported so far, in which a VSTOL aircraft operating in ground vicinity with front wind or small forward movement may result in enhanced negative pressures in the underside of the aircraft causing a pitching moment and a suction down force towards the ground. To extend the experimental results, the flow was also numerically simulated using a Reynolds Averaged Navier-Stokes formulation with the "k-ε" turbulence model.pt_PT
dc.description.sponsorshipFundação para a Ciência e a Tecnologiapt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationVieira, D.F.C., Silva, A.R.R., Neves, F.M.S.P., Carvalho, P.S.D., Barata, J.M.M. Numerical and Experimental Study of Two Impinging Jets in a Row through a Crossflow 51th Aerospace Sciences Meeting, Grapevine (Dallas/Ft. Worth Region), Texas, EUA, 7-10 janeiro, 2013 DOI: 10.2514/6.2013-806pt_PT
dc.identifier.doi10.2514/6.2013-806pt_PT
dc.identifier.isbn978-162410181-6
dc.identifier.urihttp://hdl.handle.net/10400.6/12179
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAmerican Institute of Aeronautics and Astronautics Incpt_PT
dc.relationTurbulent Structure of the Impact Zone of a Ground Vortex Flow
dc.relation.publisherversionhttps://arc.aiaa.org/doi/abs/10.2514/6.2013-806pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nd/4.0/pt_PT
dc.subjectHorseshoe Vortexpt_PT
dc.subjectPitching Momentpt_PT
dc.subjectReynolds Averaged Navier Stokespt_PT
dc.subjectFlow Patternspt_PT
dc.subjectNormal Stresspt_PT
dc.subjectFlow Characteristicspt_PT
dc.subjectTurbulence Modelspt_PT
dc.subjectShear Layerspt_PT
dc.subjectWind Tunnelspt_PT
dc.subjectNumerical Simulationpt_PT
dc.titleNumerical and Experimental Study of Two Impinging Jets in a Row through a Crossflowpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleTurbulent Structure of the Impact Zone of a Ground Vortex Flow
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876-PPCDTI/PTDC%2FEME-MFE%2F102190%2F2008/PT
oaire.citation.conferencePlaceGrapevine (Dallas/Ft. Worth Region), Texaspt_PT
oaire.citation.title51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Expositionpt_PT
oaire.fundingStream5876-PPCDTI
person.familyNameVieira
person.familyNameResende Rodrigues da Silva
person.familyNameSilva Pereira das Neves
person.familyNameMartins Barata
person.givenNameDiana
person.givenNameAndré
person.givenNameFernando Manuel da
person.givenNameJorge Manuel
person.identifierJ-4185-2012
person.identifierhFY_5JYAAAAJ&hl
person.identifier.ciencia-idC410-A26E-8F83
person.identifier.ciencia-id8219-4B2B-E1C7
person.identifier.ciencia-idBC15-D534-3DCC
person.identifier.ciencia-idF611-BBCC-DAA8
person.identifier.orcid0000-0003-0411-5270
person.identifier.orcid0000-0002-4901-7140
person.identifier.orcid0000-0002-5826-7459
person.identifier.orcid0000-0001-9014-5008
person.identifier.scopus-author-id55252408000
person.identifier.scopus-author-id11440407500
person.identifier.scopus-author-id11439470600
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.embargofct© 2013 by the American Institute of Aeronautics and Astronautics, Inc.pt_PT
rcaap.rightsembargoedAccesspt_PT
rcaap.typearticlept_PT
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