Impact of the Flame-Holder Heat-Transfer Characteristics on the Onset of Combustion Instability

Handle URI:
http://hdl.handle.net/10754/598569
Title:
Impact of the Flame-Holder Heat-Transfer Characteristics on the Onset of Combustion Instability
Authors:
Hong, Seunghyuck; Shanbhogue, Santosh J.; Kedia, Kushal S.; Ghoniem, Ahmed F.
Abstract:
In 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.
Citation:
Hong 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.
Publisher:
Informa UK Limited
Journal:
Combustion Science and Technology
KAUST Grant Number:
KUS-110-010-01
Issue Date:
3-Oct-2013
DOI:
10.1080/00102202.2013.816575
Type:
Article
ISSN:
0010-2202; 1563-521X
Sponsors:
The 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.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorHong, Seunghyucken
dc.contributor.authorShanbhogue, Santosh J.en
dc.contributor.authorKedia, Kushal S.en
dc.contributor.authorGhoniem, Ahmed F.en
dc.date.accessioned2016-02-25T13:32:19Zen
dc.date.available2016-02-25T13:32:19Zen
dc.date.issued2013-10-03en
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.en
dc.identifier.issn0010-2202en
dc.identifier.issn1563-521Xen
dc.identifier.doi10.1080/00102202.2013.816575en
dc.identifier.urihttp://hdl.handle.net/10754/598569en
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.en
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.en
dc.publisherInforma UK Limiteden
dc.subjectCombustion instabilityen
dc.subjectFlame speeden
dc.subjectFlame-holderen
dc.subjectHeat transferen
dc.subjectThermal conductivityen
dc.titleImpact of the Flame-Holder Heat-Transfer Characteristics on the Onset of Combustion Instabilityen
dc.typeArticleen
dc.identifier.journalCombustion Science and Technologyen
dc.contributor.institutionMassachusetts Institute of Technology, Cambridge, United Statesen
kaust.grant.numberKUS-110-010-01en
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