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dc.contributor.authorYoon, Sung Hwan
dc.contributor.authorSeo, Bohyeon
dc.contributor.authorPark, Jeong
dc.contributor.authorChung, Suk Ho
dc.contributor.authorCha, Min Suk
dc.date.accessioned2018-08-28T07:48:00Z
dc.date.available2018-08-28T07:48:00Z
dc.date.issued2018-06-22
dc.identifier.citationYoon SH, Seo B, Park J, Chung SH, Cha MS (2018) Edge flame propagation via parallel electric fields in nonpremixed coflow jets. Proceedings of the Combustion Institute. Available: http://dx.doi.org/10.1016/j.proci.2018.06.026.
dc.identifier.issn1540-7489
dc.identifier.doi10.1016/j.proci.2018.06.026
dc.identifier.urihttp://hdl.handle.net/10754/628286
dc.description.abstractRecent investigations suggested that the primary influence of an electric field on a flame is flow modification caused by ionic wind, and that negative ions produced by the electron impact attachment should play a key role in the bi-directional ionic wind. In order to prove this hypothesis in electric fields parallel to the propagating flames, we designed a coflow experiment with laminar lifted flames in vertical electric fields produced by a nozzle and ground electrode installed over the flame. We found that applying DC and AC increased the flame displacement speed, and decreased the unburned velocity even to negative velocity. Velocity measurements revealed the influence of the electric body force on the flow volume, indicating the importance of the electron impact attachment when the nozzle was charged with positive voltage. The flame propagation speeds were estimated by subtracting the unburned velocity from the displacement speed, and were well correlated with those of stationary lifted flames without an applied electric field as a function of flame curvature. This supported our hypothesis that the effect of the electric field is reflected in the flow modification, and that the flame is affected by the modified flow. It also suggested that the propagation direction of premixed or nonpremixed edge flames can be manipulated by coupling the appropriate electric fields.
dc.description.sponsorshipThe research reported in this publication was supported by Competitive Research Funding from King Abdullah University of Science and Technology (KAUST). BS and JP were supported by the project of Development of the Technology of Energy from KETEP in 2017-2018.
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S1540748918302098
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Proceedings of the Combustion Institute. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Proceedings of the Combustion Institute, [, , (2018-06-22)] DOI: 10.1016/j.proci.2018.06.026 . © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectEdge flame
dc.subjectElectric field
dc.subjectIonic wind
dc.subjectLifted flame
dc.subjectPropagation
dc.titleEdge flame propagation via parallel electric fields in nonpremixed coflow jets
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentCombustion and Laser Diagnostics Laboratory
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalProceedings of the Combustion Institute
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Mechanical Engineering, Pukyong National University, Busan, Republic of Korea
kaust.personYoon, Sung Hwan
kaust.personChung, Suk Ho
kaust.personCha, Min Suk
refterms.dateFOA2018-08-30T08:54:04Z
dc.date.published-online2018-06-22
dc.date.published-print2019


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