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Numerical Study of Mixing of Co-Axial Jets

2012-06-15Journal article Embargoed access
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dc.contributor.authorSilva, André
dc.contributor.authorNeves, Fernando M. S. P.
dc.contributor.authorBarata, Jorge M M
dc.date.accessioned2022-04-11T11:00:42Z
dc.date.embargo2060-06-15
dc.date.issued2012-06-15
dc.description.abstractThis paper presents a numerical study of the effect of the turbulence intensity in the turbulent mixing of coaxial confined jets. The objective of this work is to study the effect of the initial levels of turbulence of each coaxial jet in the process of turbulent mixing for diameter ratios less than 2, which is the case of very low bypass turbofan engines. The computational method was tested using the available experimental data, and revealed good capabilities for the simulation of this kind of flows. The effect of the velocity ratio of the two streams is presented for velocity ratios of the two streams of 0.3, 1.5, and 6, and turbulence intensity ratios between 10-5 and 10 5. The results revealed that for relatively high turbulence intensities of the outer jet a vortex is always present for velocity ratios of 6 or larger, and this is independent of the turbulence intensity ratio. When the turbulence intensity of the inner jet is kept constant and the ratio of turbulence intensities is increased, the recirculation zone decreases in size, its center moves further upstream until it disappears completely. The existence of a favorable pressure gradient as a similar effect, revealing that this is an additional parameter to be taken into consideration together with the velocity ratio and turbulence intensity ratio as far as the recirculation zone is concerned.pt_PT
dc.description.sponsorshipFundação para a Ciência e a Tecnologiapt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSilva, A.R.R., Neves, F.M.S.P., Barata, J.M.M. Numerical Study of Mixing of Co-Axial Jets 47th AIAA Aerospace Sciences Meeting including The New Horizons Forum and Aerospace Exposition, Orlando, Florida, EUA, 5-8 janeiro, 2009 DOI: 10.2514/6.2009-1250pt_PT
dc.identifier.doi10.2514/6.2009-1250pt_PT
dc.identifier.isbn978-156347969-4
dc.identifier.isbn978-1-60086-973-0
dc.identifier.urihttp://hdl.handle.net/10400.6/12198
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relation.publisherversionhttps://arc.aiaa.org/doi/10.2514/6.2009-1250pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectKinetic Energypt_PT
dc.subjectTurbulence Intensitypt_PT
dc.subjectVorticespt_PT
dc.subjectPressure Coefficientpt_PT
dc.subjectTurbulent Flowpt_PT
dc.subjectShear Layerspt_PT
dc.subjectVelocity Profilespt_PT
dc.subjectTurbofan Enginespt_PT
dc.subjectCombustion Chamberspt_PT
dc.subjectMass Averaged Velocitypt_PT
dc.titleNumerical Study of Mixing of Co-Axial Jetspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceOrlando, Floridapt_PT
oaire.citation.title47th AIAA Aerospace Sciences Meeting including The New Horizons Forum and Aerospace Expositionpt_PT
person.familyNameResende Rodrigues da Silva
person.familyNameSilva Pereira das Neves
person.familyNameMartins Barata
person.givenNameAndré
person.givenNameFernando Manuel da
person.givenNameJorge Manuel
person.identifierJ-4185-2012
person.identifierhFY_5JYAAAAJ&hl
person.identifier.ciencia-id8219-4B2B-E1C7
person.identifier.ciencia-idBC15-D534-3DCC
person.identifier.ciencia-idF611-BBCC-DAA8
person.identifier.orcid0000-0002-4901-7140
person.identifier.orcid0000-0002-5826-7459
person.identifier.orcid0000-0001-9014-5008
person.identifier.scopus-author-id11440407500
person.identifier.scopus-author-id11439470600
rcaap.embargofctCopyright © 2009 by the American Institute of Aeronautics and Astronautics, Inc.pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication908e150d-3890-457c-b5da-09c84671cb93
relation.isAuthorOfPublication4f84a2ce-0a92-475b-9a13-87b26a6b1109
relation.isAuthorOfPublicationc4346556-933d-4f70-9b6d-8e1670d57be6
relation.isAuthorOfPublication.latestForDiscoveryc4346556-933d-4f70-9b6d-8e1670d57be6

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