Dynamic-Stability Characteristics of Premixed Methane Oxy-Combustion

Handle URI:
http://hdl.handle.net/10754/598031
Title:
Dynamic-Stability Characteristics of Premixed Methane Oxy-Combustion
Authors:
Shroll, Andrew P.; Shanbhogue, Santosh J.; Ghoniem, Ahmed F.
Abstract:
This work explores the dynamic stability characteristics of premixed CH 4/O 2/CO 2 mixtures in a 50 kW swirl stabilized combustor. In all cases, the methane-oxygen mixture is stoichiometric, with different dilution levels of carbon dioxide used to control the flame temperature (T ad). For the highest T ad's, the combustor is unstable at the first harmonic of the combustor's natural frequency. As the temperature is reduced, the combustor jumps to fundamental mode and then to a low-frequency mode whose value is well below the combustor's natural frequency, before eventually reaching blowoff. Similar to the case of CH 4/air mixtures, the transition from one mode to another is predominantly a function of the T ad of the reactive mixture, despite significant differences in laminar burning velocity and/or strained flame consumption speed between air and oxy-fuel mixtures for a given T ad. High speed images support this finding by revealing similar vortex breakdown modes and thus similar turbulent flame geometries that change as a function of flame temperature. Copyright © 2012 American Society of Mechanical Engineers.
Citation:
Shroll AP, Shanbhogue SJ, Ghoniem AF (2012) Dynamic-Stability Characteristics of Premixed Methane Oxy-Combustion. Journal of Engineering for Gas Turbines and Power 134: 051504. Available: http://dx.doi.org/10.1115/1.4004737.
Publisher:
ASME International
Journal:
Journal of Engineering for Gas Turbines and Power
KAUST Grant Number:
KUS-110-010-01
Issue Date:
2012
DOI:
10.1115/1.4004737
Type:
Article
ISSN:
0742-4795
Sponsors:
This research was supported by a grant from King Abdullah University of Science and Technology (KAUST), Grant No. KUS-110-010-01.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorShroll, Andrew P.en
dc.contributor.authorShanbhogue, Santosh J.en
dc.contributor.authorGhoniem, Ahmed F.en
dc.date.accessioned2016-02-25T13:11:20Zen
dc.date.available2016-02-25T13:11:20Zen
dc.date.issued2012en
dc.identifier.citationShroll AP, Shanbhogue SJ, Ghoniem AF (2012) Dynamic-Stability Characteristics of Premixed Methane Oxy-Combustion. Journal of Engineering for Gas Turbines and Power 134: 051504. Available: http://dx.doi.org/10.1115/1.4004737.en
dc.identifier.issn0742-4795en
dc.identifier.doi10.1115/1.4004737en
dc.identifier.urihttp://hdl.handle.net/10754/598031en
dc.description.abstractThis work explores the dynamic stability characteristics of premixed CH 4/O 2/CO 2 mixtures in a 50 kW swirl stabilized combustor. In all cases, the methane-oxygen mixture is stoichiometric, with different dilution levels of carbon dioxide used to control the flame temperature (T ad). For the highest T ad's, the combustor is unstable at the first harmonic of the combustor's natural frequency. As the temperature is reduced, the combustor jumps to fundamental mode and then to a low-frequency mode whose value is well below the combustor's natural frequency, before eventually reaching blowoff. Similar to the case of CH 4/air mixtures, the transition from one mode to another is predominantly a function of the T ad of the reactive mixture, despite significant differences in laminar burning velocity and/or strained flame consumption speed between air and oxy-fuel mixtures for a given T ad. High speed images support this finding by revealing similar vortex breakdown modes and thus similar turbulent flame geometries that change as a function of flame temperature. Copyright © 2012 American Society of Mechanical Engineers.en
dc.description.sponsorshipThis research was supported by a grant from King Abdullah University of Science and Technology (KAUST), Grant No. KUS-110-010-01.en
dc.publisherASME Internationalen
dc.subjectcombustion dynamicsen
dc.subjectoxy-fuelen
dc.subjectpremixeden
dc.titleDynamic-Stability Characteristics of Premixed Methane Oxy-Combustionen
dc.typeArticleen
dc.identifier.journalJournal of Engineering for Gas Turbines and Poweren
dc.contributor.institutionMassachusetts Institute of Technology, Cambridge, United Statesen
kaust.grant.numberKUS-110-010-01en
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