Show simple item record

dc.contributor.authorPark, Jeong
dc.contributor.authorPark, Sun Ho
dc.contributor.authorCha, Min Suk
dc.contributor.authorChung, Suk Ho
dc.date.accessioned2020-01-15T11:28:18Z
dc.date.available2020-01-15T11:28:18Z
dc.date.issued2019-11-20
dc.identifier.citationPark, J., Park, S. H., Cha, M. S., & Chung, S. H. (2019). Effect of DC Electric Fields on Flame Spread Over Twin Electrical Wires. Volume 3A: Fluid Applications and Systems. doi:10.1115/ajkfluids2019-4693
dc.identifier.doi10.1115/AJKFluids2019-4693
dc.identifier.urihttp://hdl.handle.net/10754/661048
dc.description.abstractThe effect of DC electric field on the behaviors of spreading flame over polyethylene (PE)-insulated twin electrical wires was investigated by varying the wire gap (S) and voltage (VDC). The twin flame spreads with the same flame spread rate (FSR) independently when no electric field is applied. With an applied DC electric field, the twin flame interacts such that FSR, flame width, and the leaning direction of interacting twin flames vary appreciably. The spread rate for wire flame with negative voltage (SF-) was larger than that with positive voltage (SF+) during transient period and then the two became the same in a developed region (a quasi-steady spread). Such a flame behavior could be grouped into two: twin flame spread (regime I) and single flame spread (regime II) after the extinction of SF+. Each regime could be categorized into three sub-regimes depending on S and VDC. For small VDC, the flame leaned toward the burnt wire, reducing FSR. With further increasing VDC, FSR increased due to the ionic wind effect and then decreased via the mass loss of molten PE. These non-monotonic behavior of FSR with DC voltage can be attributed the behaviors of molten PE, exhibiting dripping, electrospray, and di-electrophoresis phenomena. For further increased voltage, the flames were extinguished by streamer generation and an electrical short occurred at excessive voltages.
dc.description.sponsorshipThis work was supported by the SGER Program through the National Research Foundation (NRF) of Korea funded by the Ministry of Education, Science, and Technology (2018–2019). SHC and MSC were supported by King Abdullah University of Science and Technology.
dc.publisherASME International
dc.relation.urlhttps://asmedigitalcollection.asme.org/FEDSM/proceedings/AJKFluids2019/59049/San%20Francisco,%20California,%20USA/1069265
dc.rightsArchived with thanks to American Society of Mechanical Engineers
dc.titleEffect of DC electric fields on flame spread over twin electrical wires
dc.typeConference Paper
dc.contributor.departmentCombustion and Laser Diagnostics Laboratory
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.conference.date2019-07-28 to 2019-08-01
dc.conference.nameASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019
dc.conference.locationSan Francisco, CA, USA
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Mechanical Engineering, Pukyong National University, Busan, Korea
kaust.personCha, Min Suk
kaust.personChung, Suk Ho
refterms.dateFOA2020-01-19T05:59:13Z
dc.date.published-online2019-11-20
dc.date.published-print2019-07-28


Files in this item

Thumbnail
Name:
accepted draft.pdf
Size:
969.0Kb
Format:
PDF
Description:
Accepted manuscript

This item appears in the following Collection(s)

Show simple item record