Effect of AC electric fields on the stabilization of premixed bunsen flames

Handle URI:
http://hdl.handle.net/10754/561595
Title:
Effect of AC electric fields on the stabilization of premixed bunsen flames
Authors:
Kim, Minkuk; Chung, Suk-Ho ( 0000-0001-8782-312X ) ; Kim, Hwanho
Abstract:
The stabilization characteristics of laminar premixed bunsen flames have been investigated experimentally for stoichiometric methane-air mixture by applying AC voltage to the nozzle with the single-electrode configuration. The detachment velocity either at blowoff or partial-detachment has been measured by varying the applied voltage and frequency of AC. The result showed that the detachment velocity increased with the applied AC electric fields, such that the flame could be nozzle-attached even over five times of the blowoff velocity without having electric fields. There existed four distinct regimes depending on applied AC voltage and frequency. In the low voltage regime, the threshold condition of AC electric fields was identified, below which the effect of electric fields on the detachment velocity is minimal. In the moderate voltage regime, the flame base oscillated with the frequency synchronized to AC frequency and the detachment velocity increased linearly with the applied AC voltage and nonlinearly with the frequency. In the high voltage regime, two different sub-regimes depending on AC frequency were observed. For relatively low frequency, the flame base oscillated with the applied AC frequency together with the half frequency and the variation of the detachment velocity was insensitive to the applied voltage. For relatively high frequency, the stabilization of the flame was significantly affected by the generation of streamers and the detachment velocity decreased with the applied voltage. © 2010 Published by Elsevier Inc. on behalf of The Combustion Institute. All rights reserved.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Combustion and Laser Diagnostics Laboratory
Publisher:
Elsevier
Journal:
Proceedings of the Combustion Institute
Issue Date:
2011
DOI:
10.1016/j.proci.2010.06.062
Type:
Article
ISSN:
15407489
Sponsors:
This work was supported by AEA project/KAUST.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorKim, Minkuken
dc.contributor.authorChung, Suk-Hoen
dc.contributor.authorKim, Hwanhoen
dc.date.accessioned2015-08-02T09:14:59Zen
dc.date.available2015-08-02T09:14:59Zen
dc.date.issued2011en
dc.identifier.issn15407489en
dc.identifier.doi10.1016/j.proci.2010.06.062en
dc.identifier.urihttp://hdl.handle.net/10754/561595en
dc.description.abstractThe stabilization characteristics of laminar premixed bunsen flames have been investigated experimentally for stoichiometric methane-air mixture by applying AC voltage to the nozzle with the single-electrode configuration. The detachment velocity either at blowoff or partial-detachment has been measured by varying the applied voltage and frequency of AC. The result showed that the detachment velocity increased with the applied AC electric fields, such that the flame could be nozzle-attached even over five times of the blowoff velocity without having electric fields. There existed four distinct regimes depending on applied AC voltage and frequency. In the low voltage regime, the threshold condition of AC electric fields was identified, below which the effect of electric fields on the detachment velocity is minimal. In the moderate voltage regime, the flame base oscillated with the frequency synchronized to AC frequency and the detachment velocity increased linearly with the applied AC voltage and nonlinearly with the frequency. In the high voltage regime, two different sub-regimes depending on AC frequency were observed. For relatively low frequency, the flame base oscillated with the applied AC frequency together with the half frequency and the variation of the detachment velocity was insensitive to the applied voltage. For relatively high frequency, the stabilization of the flame was significantly affected by the generation of streamers and the detachment velocity decreased with the applied voltage. © 2010 Published by Elsevier Inc. on behalf of The Combustion Institute. All rights reserved.en
dc.description.sponsorshipThis work was supported by AEA project/KAUST.en
dc.publisherElsevieren
dc.subjectBlowoffen
dc.subjectElectric fieldsen
dc.subjectLaminar jeten
dc.subjectPremixed flameen
dc.subjectStabilizationen
dc.titleEffect of AC electric fields on the stabilization of premixed bunsen flamesen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMechanical Engineering Programen
dc.contributor.departmentCombustion and Laser Diagnostics Laboratoryen
dc.identifier.journalProceedings of the Combustion Instituteen
dc.contributor.institutionSchool of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, South Koreaen
kaust.authorKim, Minkuken
kaust.authorChung, Suk-Hoen
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