Effect of electric fields on the stabilization of premixed laminar bunsen flames at low AC frequency: Bi-ionic wind effect

Handle URI:
http://hdl.handle.net/10754/562108
Title:
Effect of electric fields on the stabilization of premixed laminar bunsen flames at low AC frequency: Bi-ionic wind effect
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 by applying AC electric fields at low frequency below 60. Hz together with DC in the single electrode configuration. The blowoff velocity has been measured for varying AC voltage and frequency. A transition frequency between low and high frequency regimes has been identified near 40-50. Hz, where AC electric fields have minimal effect on flame stabilization. In the low frequency regime, the blowoff velocity decreased linearly with AC voltage such that the flames became less stable. This was consistent with the DC result, implying the influence of the ionic wind effect. The variation of blowoff velocity with AC frequency showed a non-monotonic behavior in that the velocity decreased and then increased, exhibiting minimum blowoff velocity near 6-8. Hz. Based on the molecular kinetic theory, the developing degree of ionic wind was derived. By considering the ionic wind effects arising from both positive and negative ions in a flame zone, the bi-ionic wind effect successfully explained the non-monotonic behavior of blowoff velocity with AC frequency in the low frequency regime. © 2011 The Combustion Institute.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Combustion and Laser Diagnostics Laboratory
Publisher:
Elsevier
Journal:
Combustion and Flame
Issue Date:
Mar-2012
DOI:
10.1016/j.combustflame.2011.10.018
Type:
Article
ISSN:
00102180
Sponsors:
This work was supported by KAUST AEA Project.
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.accessioned2015-08-03T09:44:59Zen
dc.date.available2015-08-03T09:44:59Zen
dc.date.issued2012-03en
dc.identifier.issn00102180en
dc.identifier.doi10.1016/j.combustflame.2011.10.018en
dc.identifier.urihttp://hdl.handle.net/10754/562108en
dc.description.abstractThe stabilization characteristics of laminar premixed bunsen flames have been investigated experimentally by applying AC electric fields at low frequency below 60. Hz together with DC in the single electrode configuration. The blowoff velocity has been measured for varying AC voltage and frequency. A transition frequency between low and high frequency regimes has been identified near 40-50. Hz, where AC electric fields have minimal effect on flame stabilization. In the low frequency regime, the blowoff velocity decreased linearly with AC voltage such that the flames became less stable. This was consistent with the DC result, implying the influence of the ionic wind effect. The variation of blowoff velocity with AC frequency showed a non-monotonic behavior in that the velocity decreased and then increased, exhibiting minimum blowoff velocity near 6-8. Hz. Based on the molecular kinetic theory, the developing degree of ionic wind was derived. By considering the ionic wind effects arising from both positive and negative ions in a flame zone, the bi-ionic wind effect successfully explained the non-monotonic behavior of blowoff velocity with AC frequency in the low frequency regime. © 2011 The Combustion Institute.en
dc.description.sponsorshipThis work was supported by KAUST AEA Project.en
dc.publisherElsevieren
dc.subjectBi-ionic wind effecten
dc.subjectElectric fieldsen
dc.subjectPremixed bunsen flameen
dc.subjectStabilizationen
dc.titleEffect of electric fields on the stabilization of premixed laminar bunsen flames at low AC frequency: Bi-ionic wind effecten
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.journalCombustion and Flameen
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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