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dc.contributor.authorZhang, H
dc.contributor.authorGarmory, A
dc.contributor.authorCavaliere, DE
dc.contributor.authorMastorakos, E
dc.date.accessioned2015-01-27T15:57:40Z
dc.date.available2015-01-27T15:57:40Z
dc.date.issued2015
dc.identifier.citationProceedings of the Combustion Institute Volume 35, Issue 2, 2015, Pages 1167–1174. DOI: 10.1016/j.proci.2014.05.052
dc.identifier.issn1540-7489
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/246617
dc.descriptionThis is the accepted manuscript. The final version is available from Elsevier at http://www.sciencedirect.com/science/article/pii/S1540748914000558.
dc.description.abstractThe Large Eddy Simulation (LES)/three-dimensional Conditional Moment Closure (3D-CMC) model with detailed chemistry and finite-volume formulation is employed to simulate a swirl-stabilized nonpremixed flame with local extinction. The results demonstrate generally good agreement with the measurements concerning velocity, flame shape, and statistics of flame lift-off, but the penetration of fuel jet into the recirculation zone is under-predicted possibly due to the over-predicted swirl velocities in the chamber. Localized extinctions are seen in the LES, in agreement with experiment. The local extinction event is shown by very low heat release rate and hydroxyl mass fraction and reduced temperature, and is accompanied by relatively high scalar dissipation. In mixture fraction space, CMC cells with strong turbulence-chemistry interaction and local extinction show relatively large fluctuations between fully burning and intermediate distributions. The probability density functions of conditional reactedness, which shows how far the conditionally-filtered scalars are from reference fully burning profiles, indicate that for CMC cells with local extinction, some reactive scalars demonstrate pronounced bimodality while for those cells with strong reactivity the PDFs are very narrow.
dc.description.sponsorshipHZ acknowledges the financial support from EPSRC through a Dorothy Hodgkin Postgraduate Award.
dc.language.isoen
dc.publisherElsevier BV
dc.rightsAll Rights Reserved
dc.rights.urihttps://www.rioxx.net/licenses/all-rights-reserved/
dc.subjectLarge eddy simulation
dc.subjectconditional moment closure
dc.subjectswirl non-premixed flames
dc.subjectlocal extinction
dc.subjectlift-off
dc.titleLarge Eddy Simulation/Conditional Moment Closure modeling of swirl-stabilized non-premixed flames with local extinction
dc.typeArticle
dc.type.versionaccepted version
prism.endingPage1174
prism.issueIdentifier2
prism.publicationNameProceedings of the Combustion Institute
prism.startingPage1167
prism.volume35
dc.rioxxterms.funderEPSRC
pubs.declined2017-10-11T13:54:33.801+0100
rioxxterms.versionofrecord10.1016/j.proci.2014.05.052
dc.contributor.orcidZhang, H [0000-0002-5215-5712]
dc.identifier.eissn1873-2704
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/K025791/1)
rioxxterms.freetoread.startdate2015-06-25


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