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dc.contributor.authorHong, Seunghyuck
dc.contributor.authorShanbhogue, Santosh J.
dc.contributor.authorKedia, Kushal S.
dc.contributor.authorGhoniem, Ahmed F.
dc.date.accessioned2016-02-25T13:32:19Z
dc.date.available2016-02-25T13:32:19Z
dc.date.issued2013-10-03
dc.identifier.citationHong S, Shanbhogue SJ, Kedia KS, Ghoniem AF (2013) Impact of the Flame-Holder Heat-Transfer Characteristics on the Onset of Combustion Instability. Combustion Science and Technology 185: 1541–1567. Available: http://dx.doi.org/10.1080/00102202.2013.816575.
dc.identifier.issn0010-2202
dc.identifier.issn1563-521X
dc.identifier.doi10.1080/00102202.2013.816575
dc.identifier.urihttp://hdl.handle.net/10754/598569
dc.description.abstractIn this article, we investigate the impact of heat transfer between the flame and the flameholder on the dynamic stability characteristics of a 50-kW backward-facing step combustor. We conducted a series of tests where two backward step blocks were used, made of ceramic and stainless steel, whose thermal conductivities are 1.06 and 12 W/m/K, respectively. Stability characteristics of the two flame-holder materials were examined using measurements of the dynamic pressure and flame chemiluminescence over a range of operating conditions. Results show that with the ceramic flameholder, the onset of instability is significantly delayed in time and, for certain operating conditions, disappears altogether, whereas with the higher conductivity material, the combustor becomes increasingly unstable over a range of operating conditions. We explain these trends using the heat flux through the flameholder and the change in the burning velocity near the step wall. Results suggest a potential approach using low-thermal-conductivity material near the flame-holder as passive dynamics suppression methods. Copyright © Taylor & Francis Group, LLC.
dc.description.sponsorshipThe authors acknowledge the King Abdullah University of Science and Technology for their support of this research. This work was funded by KAUST Grant No. KUS-110-010-01.
dc.publisherInforma UK Limited
dc.subjectCombustion instability
dc.subjectFlame speed
dc.subjectFlame-holder
dc.subjectHeat transfer
dc.subjectThermal conductivity
dc.titleImpact of the Flame-Holder Heat-Transfer Characteristics on the Onset of Combustion Instability
dc.typeArticle
dc.identifier.journalCombustion Science and Technology
dc.contributor.institutionMassachusetts Institute of Technology, Cambridge, United States
kaust.grant.numberKUS-110-010-01


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