AC electric field induced vortex in laminar coflow diffusion flames

Handle URI:
http://hdl.handle.net/10754/575890
Title:
AC electric field induced vortex in laminar coflow diffusion flames
Authors:
Xiong, Yuan ( 0000-0001-5328-3487 ) ; Cha, Min Suk ( 0000-0003-4059-3421 ) ; Chung, Suk-Ho ( 0000-0001-8782-312X )
Abstract:
Experiments were performed by applying sub-critical high-voltage alternating current (AC) to the nozzle of laminar propane coflow diffusion flames. Light scattering, laser-induced incandescence and laser-induced fluorescence techniques were used to identify the soot zone, and the structures of OH and polycyclic aromatic hydrocarbons (PAHs). Particle image velocimetry was adopted to quantify the velocity field. Under certain AC conditions of applied voltage and frequency, the distribution of PAHs and the flow field near the nozzle exit were drastically altered, leading to the formation of toroidal vortices. Increased residence time and heat recirculation inside the vortex resulted in appreciable formation of PAHs and soot near the nozzle exit. Decreased residence time along the jet axis through flow acceleration by the vortex led to a reduction in the soot volume fraction in the downstream sooting zone. Electromagnetic force generated by AC was proposed as a viable mechanism for the formation of the toroidal vortex. The onset conditions for the vortex formation supported the role of an electromagnetic force acting on charged particles in the flame zone. (C) 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
KAUST Department:
Clean Combustion Research Center
Publisher:
Elsevier BV
Journal:
Proceedings of the Combustion Institute
Conference/Event name:
30th International Symposium on Combustion
Issue Date:
22-Sep-2014
DOI:
10.1016/j.proci.2014.08.027
Type:
Conference Paper
ISSN:
1540-7489
Sponsors:
Research reported in this publication was supported by KAUST-AEA project.
Appears in Collections:
Conference Papers; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorXiong, Yuanen
dc.contributor.authorCha, Min Suken
dc.contributor.authorChung, Suk-Hoen
dc.date.accessioned2015-08-25T06:18:10Zen
dc.date.available2015-08-25T06:18:10Zen
dc.date.issued2014-09-22en
dc.identifier.issn1540-7489en
dc.identifier.doi10.1016/j.proci.2014.08.027en
dc.identifier.urihttp://hdl.handle.net/10754/575890en
dc.description.abstractExperiments were performed by applying sub-critical high-voltage alternating current (AC) to the nozzle of laminar propane coflow diffusion flames. Light scattering, laser-induced incandescence and laser-induced fluorescence techniques were used to identify the soot zone, and the structures of OH and polycyclic aromatic hydrocarbons (PAHs). Particle image velocimetry was adopted to quantify the velocity field. Under certain AC conditions of applied voltage and frequency, the distribution of PAHs and the flow field near the nozzle exit were drastically altered, leading to the formation of toroidal vortices. Increased residence time and heat recirculation inside the vortex resulted in appreciable formation of PAHs and soot near the nozzle exit. Decreased residence time along the jet axis through flow acceleration by the vortex led to a reduction in the soot volume fraction in the downstream sooting zone. Electromagnetic force generated by AC was proposed as a viable mechanism for the formation of the toroidal vortex. The onset conditions for the vortex formation supported the role of an electromagnetic force acting on charged particles in the flame zone. (C) 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved.en
dc.description.sponsorshipResearch reported in this publication was supported by KAUST-AEA project.en
dc.publisherElsevier BVen
dc.titleAC electric field induced vortex in laminar coflow diffusion flamesen
dc.typeConference Paperen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalProceedings of the Combustion Instituteen
dc.conference.date2004-07-25 to 2004-07-30en
dc.conference.name30th International Symposium on Combustionen
dc.conference.locationChicago, IL, USAen
kaust.authorXiong, Yuanen
kaust.authorCha, Min Suken
kaust.authorChung, Suk-Hoen
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