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dc.contributor.authorTatsumi, Kazuya
dc.contributor.authorTanaka, Miyako
dc.contributor.authorWoodfield, Peter L
dc.contributor.authorNakabe, Kazuyoshi
dc.contributor.editorT. B. Gatski, N. Kasagi, B. E. Launder
dc.date.accessioned2017-05-03T15:47:59Z
dc.date.available2017-05-03T15:47:59Z
dc.date.issued2010
dc.date.modified2011-02-14T09:12:17Z
dc.identifier.issn0142-727X
dc.identifier.doi10.1016/j.ijheatfluidflow.2009.09.005
dc.identifier.urihttp://hdl.handle.net/10072/36130
dc.description.abstractA three-dimensional numerical simulation was carried out to examine the effects of swirl and buoyancy-driven flows on the mixing performance of a baffle-plate-type miniature confined multijet. Swirl flow was produced by inclining the jet nozzles surrounding the central jet in the circumferential direction. The results obtained were compared with those of the non-swirl case. The swirl flow interrupted the radial secondary flow generated in the region adjacent to the baffle plate. This interruption decreased the size of the reverse flow region, resulting in a deterioration of the mixing performance. This behavior was more noticeable in the case of a large swirl number. During the study of the buoyancy effect, the operating direction of the gravitational force was changed with respect to the central axis of the mixing chamber, i.e. the attack angles were 0ଠ90ࠡnd 180஠The buoyancy effect was negligible when the operating direction was parallel to the chamber axis. However, when the attack angle was 90ଠasymmetric distributions of mixture fraction and flow velocity were obtained, and the mixing performance was found to be poor. In the swirl-accompanied cases, the effect of buoyancy force was apparent even when the operating direction was parallel to the central axis. The swirl flow, which reduced the secondary flow effects of the reverse and radial flows, tended to increase the effect of the buoyancy force on the multijet flow. On the other hand, the swirl flow prevented the mixture fraction distribution to be asymmetric in the case of buoyancy with 90ࠡttack angle. These tendencies became more conspicuous for flows with stronger swirl.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.publisher.placeUnited States
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom45
dc.relation.ispartofpageto56
dc.relation.ispartofissue1
dc.relation.ispartofjournalInternational Journal of Heat and Fluid Flow
dc.relation.ispartofvolume31
dc.rights.retentionY
dc.subject.fieldofresearchAerospace engineering
dc.subject.fieldofresearchMechanical engineering
dc.subject.fieldofresearchEnergy generation, conversion and storage (excl. chemical and electrical)
dc.subject.fieldofresearchcode4001
dc.subject.fieldofresearchcode4017
dc.subject.fieldofresearchcode401703
dc.titleSwirl and buoyancy effects on mixing performance of baffle-plate-type miniature confined multijet
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.date.issued2010
gro.hasfulltextNo Full Text
gro.griffith.authorWoodfield, Peter L.


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