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dc.contributor.authorWang, Yu
dc.contributor.authorChung, Suk Ho
dc.date.accessioned2016-02-17T06:56:04Z
dc.date.available2016-02-17T06:56:04Z
dc.date.issued2016-01-20
dc.identifier.citationStrain rate effect on sooting characteristics in laminar counterflow diffusion flames 2016 Combustion and Flame
dc.identifier.issn00102180
dc.identifier.doi10.1016/j.combustflame.2015.12.028
dc.identifier.urihttp://hdl.handle.net/10754/596476
dc.description.abstractThe effects of strain rate, oxygen enrichment and fuel type on the sooting characteristics of counterflow diffusion flames were studied. The sooting structures and relative PAH concentrations were measured with laser diagnostics. Detailed soot modeling using recently developed PAH chemistry and surface reaction mechanism was performed and the results were compared with experimental data for ethylene flames, focusing on the effects of strain rates. The results showed that increase in strain rate reduced soot volume fraction, average size and peak number density. Increase in oxygen mole fraction increased soot loading and decreased its sensitivity on strain rate. The soot volume fractions of ethane, propene and propane flames were also measured as a function of global strain rate. The sensitivity of soot volume fraction to strain rate was observed to be fuel dependent at a fixed oxygen mole fraction, with the sensitivity being higher for more sooting fuels. However, when the soot loadings were matched at a reference strain rate for different fuels by adjusting oxygen mole fraction, the dependence of soot loading on strain rate became comparable among the tested fuels. PAH concentrations were shown to decrease with increase in strain rate and the dependence on strain rate is more pronounced for larger PAHs. Soot modeling was performed using detailed PAH growth chemistry with molecular growth up to coronene. A qualitative agreement was obtained between experimental and simulation results, which was then used to explain the experimentally observed strain rate effect on soot growth. However, quantitatively, the simulation result exhibits higher sensitivity to strain rate, especially for large PAHs and soot volume fractions.
dc.language.isoen
dc.publisherElsevier BV
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S001021801500471X
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Combustion and Flame. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Combustion and Flame, 20 January 2016. DOI: 10.1016/j.combustflame.2015.12.028
dc.subjectSoot formation
dc.subjectPAH
dc.subjectStrain rates
dc.subjectCounterflow diffusion flame
dc.titleStrain rate effect on sooting characteristics in laminar counterflow diffusion flames
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentCombustion and Laser Diagnostics Laboratory
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalCombustion and Flame
dc.eprint.versionPost-print
dc.contributor.institutionHubei Key Laboratory of Advanced Technology for Automotive Components, School of Automotive Engineering, Wuhan University of Technology, Wuhan, PR China
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personWang, Yu
kaust.personChung, Suk Ho
refterms.dateFOA2018-01-20T00:00:00Z
dc.date.published-online2016-01-20
dc.date.published-print2016-03


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