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Experimental Study of Two Impinging Jets Aligned With a Crossflow

2014-10Journal article Open 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.accessioned2022-01-06T16:17:57Z
dc.date.available2022-01-06T16:17:57Z
dc.date.issued2014-10
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 Rej = 4.3 × 104, an impingement height of 20.1 jet diameters and for a velocity ratio between the jet exit and the crossflow VR = Vj/Uo of 22.5, and an inter-jet 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) 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 is most relevant 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.doi10.4236/jmp.2014.516175pt_PT
dc.identifier.issn2153-1196
dc.identifier.urihttp://hdl.handle.net/10400.6/11555
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherScientific Research Publishingpt_PT
dc.relationTurbulent Structure of the Impact Zone of a Ground Vortex Flow
dc.relation.publisherversionhttps://www.scirp.org/pdf/JMP_2014103013242031.pdfpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectImpinging Jetspt_PT
dc.subjectCrossflowpt_PT
dc.titleExperimental Study of Two Impinging Jets Aligned With 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.endPage1788pt_PT
oaire.citation.issue16pt_PT
oaire.citation.startPage1779pt_PT
oaire.citation.titleJournal of Modern Physicspt_PT
oaire.citation.volume05pt_PT
oaire.fundingStream5876-PPCDTI
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
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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