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Numerical Simulation of Twin Impinging Jets in Tandem Through a Crossflow

2015Journal article Open access
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dc.contributor.authorVieira, Diana
dc.contributor.authorBarata, Jorge M M
dc.contributor.authorNeves, Fernando M. S. P.
dc.contributor.authorSilva, A. R. R.
dc.date.accessioned2022-01-03T10:56:23Z
dc.date.available2022-01-03T10:56:23Z
dc.date.issued2015
dc.description.abstractThe flow field of ground vortex generated by twin impinging jets in tandem through a crossflow is numerically studied in detail. Numerical simulation and visualization are presented for two turbulent circular jets emerging into a low velocity cross stream, impinging after on a flat surface perpendicular to the geometrical jet nozzle axis. The numerical study is based in experimental studies done early, so all the features of the experimental flow were maintained when the numerical simulation was performed. The Reynolds number used was based on the jet exit conditions of 43.000-105.000, a jet to crossflow velocity ratio of 22.5-43.8 an impinging height of 20.1 jet diameters and an interject spacing’s of S = 5D and L = 6D. The analysis of the flow was extended to regions and flow conditions for which no measurements have been obtained in last experimental studies, i.e., for velocity ratios of 7.5-60. The numerical results show that for the smallest velocity ratios the jets initially do not mix but remain together in two layers. Three different types of flow regimes were identify, therefore when VSTOL aircrafts operating in ground vicinity, only the regime with strong impingement on ground and with a formation of a ground vortex is relevant. The numerical results allowed to extend the last experimental studies and prove that the deflection of the rear jet is due to the competing influences the wake, the shear layer, the downstream wall jet of the first jet and the crossflow.pt_PT
dc.description.sponsorshipFundação para a Ciência e a Tecnologiapt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationDiana F.C. Vieira, Jorge , M.M. Barata, Fernando M.S.P. Neves and Andre R.R. Silva, 2015. Numerical Simulation of Twin Impinging Jets in Tandem Through a Crossflow. Journal of Engineering and Applied Sciences, 10: 123-136pt_PT
dc.identifier.doi10.36478/jeasci.2015.123.136pt_PT
dc.identifier.issn1816949X
dc.identifier.urihttp://hdl.handle.net/10400.6/11536
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMedwellpt_PT
dc.relationTurbulent Structure of the Impact Zone of a Ground Vortex Flow
dc.relationTWIN IMPINGING JETS INLINE WITH A LOW-VELOCITY CROSSFLOW
dc.relation.publisherversionhttps://medwelljournals.com/abstract/?doi=jeasci.2015.123.136pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectCrossflowpt_PT
dc.subjectGround vortexpt_PT
dc.subjectImpinging jetspt_PT
dc.subjectTandempt_PT
dc.subjectWakept_PT
dc.titleNumerical Simulation of Twin Impinging Jets in Tandem Through a Crossflowpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleTurbulent Structure of the Impact Zone of a Ground Vortex Flow
oaire.awardTitleTWIN IMPINGING JETS INLINE WITH A LOW-VELOCITY CROSSFLOW
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876-PPCDTI/PTDC%2FEME-MFE%2F102190%2F2008/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F86434%2F2012/PT
oaire.citation.endPage136pt_PT
oaire.citation.issue6pt_PT
oaire.citation.startPage123pt_PT
oaire.citation.titleJournal of Engineering and Applied Sciencespt_PT
oaire.citation.volume10pt_PT
oaire.fundingStream5876-PPCDTI
person.familyNameVieira
person.familyNameMartins Barata
person.familyNameSilva Pereira das Neves
person.familyNameResende Rodrigues da Silva
person.givenNameDiana
person.givenNameJorge Manuel
person.givenNameFernando Manuel da
person.givenNameAndré
person.identifierhFY_5JYAAAAJ&hl
person.identifierJ-4185-2012
person.identifier.ciencia-idC410-A26E-8F83
person.identifier.ciencia-idF611-BBCC-DAA8
person.identifier.ciencia-idBC15-D534-3DCC
person.identifier.ciencia-id8219-4B2B-E1C7
person.identifier.orcid0000-0003-0411-5270
person.identifier.orcid0000-0001-9014-5008
person.identifier.orcid0000-0002-5826-7459
person.identifier.orcid0000-0002-4901-7140
person.identifier.scopus-author-id55252408000
person.identifier.scopus-author-id11439470600
person.identifier.scopus-author-id11440407500
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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