Impact of the Flameholder Heat Conductivity on Combustion Instability Characteristics

Handle URI:
http://hdl.handle.net/10754/598570
Title:
Impact of the Flameholder Heat Conductivity on Combustion Instability Characteristics
Authors:
Hong, Seunghyuck; Shanbhogue, Santosh J.; Ghoniem, Ahmed F.
Abstract:
In this paper, we investigate the impact of heat transfer between the flame and the flame-holder on the dynamic stability characteristics in a 50-kW backward facing step combustor. We conducted tests where we use a backward step block made of two different materials: ceramic and stainless steel whose thermal conductivities are 1.06 and 12 W/m/K, respectively. A set of experiments was conducted using a propane/air mixture at Re = 6500 for the inlet temperature of 300 - 500 K at atmospheric pressure. We measure the dynamic pressure and flame chemiluminescence to examine distinct stability characteristics using each flame-holder material over a range of operating conditions. We find that for tests with a flame-holder made of ceramic, the onset of instability is significantly delayed in time and, for certain operating conditions, disappears altogether. Stated differently, for certain operating conditions, the combustor can be stabilized by reducing the thermal conductivity of the flame-holder. As the thermal conductivity of the flame-holder increases, the combustor becomes increasingly unstable over a range of operating conditions. These results imply that the dynamic stability characteristics depend strongly on the heat transfer between the flame and the combustor wall near the flame anchoring region. Copyright © 2012 by ASME.
Citation:
Hong S, Shanbhogue SJ, Ghoniem AF (2012) Impact of the Flameholder Heat Conductivity on Combustion Instability Characteristics. Volume 2: Combustion, Fuels and Emissions, Parts A and B. Available: http://dx.doi.org/10.1115/gt2012-70057.
Publisher:
ASME International
Journal:
Volume 2: Combustion, Fuels and Emissions, Parts A and B
KAUST Grant Number:
KUS-110-010-01
Issue Date:
11-Jun-2012
DOI:
10.1115/gt2012-70057
Type:
Conference Paper
Sponsors:
The authors would like to acknowledge the King Abdullah University of Science and Technology for their support of this research. This work was funded by the KAUST grant, number 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.authorGhoniem, Ahmed F.en
dc.date.accessioned2016-02-25T13:32:20Zen
dc.date.available2016-02-25T13:32:20Zen
dc.date.issued2012-06-11en
dc.identifier.citationHong S, Shanbhogue SJ, Ghoniem AF (2012) Impact of the Flameholder Heat Conductivity on Combustion Instability Characteristics. Volume 2: Combustion, Fuels and Emissions, Parts A and B. Available: http://dx.doi.org/10.1115/gt2012-70057.en
dc.identifier.doi10.1115/gt2012-70057en
dc.identifier.urihttp://hdl.handle.net/10754/598570en
dc.description.abstractIn this paper, we investigate the impact of heat transfer between the flame and the flame-holder on the dynamic stability characteristics in a 50-kW backward facing step combustor. We conducted tests where we use a backward step block made of two different materials: ceramic and stainless steel whose thermal conductivities are 1.06 and 12 W/m/K, respectively. A set of experiments was conducted using a propane/air mixture at Re = 6500 for the inlet temperature of 300 - 500 K at atmospheric pressure. We measure the dynamic pressure and flame chemiluminescence to examine distinct stability characteristics using each flame-holder material over a range of operating conditions. We find that for tests with a flame-holder made of ceramic, the onset of instability is significantly delayed in time and, for certain operating conditions, disappears altogether. Stated differently, for certain operating conditions, the combustor can be stabilized by reducing the thermal conductivity of the flame-holder. As the thermal conductivity of the flame-holder increases, the combustor becomes increasingly unstable over a range of operating conditions. These results imply that the dynamic stability characteristics depend strongly on the heat transfer between the flame and the combustor wall near the flame anchoring region. Copyright © 2012 by ASME.en
dc.description.sponsorshipThe authors would like to acknowledge the King Abdullah University of Science and Technology for their support of this research. This work was funded by the KAUST grant, number KUS-110-010-01.en
dc.publisherASME Internationalen
dc.titleImpact of the Flameholder Heat Conductivity on Combustion Instability Characteristicsen
dc.typeConference Paperen
dc.identifier.journalVolume 2: Combustion, Fuels and Emissions, Parts A and Ben
dc.contributor.institutionMassachusetts Institute of Technology, Cambridge, United Statesen
kaust.grant.numberKUS-110-010-01en
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