Electric fields effect on liftoff and blowoff of nonpremixed laminar jet flames in a coflow

Handle URI:
http://hdl.handle.net/10754/561432
Title:
Electric fields effect on liftoff and blowoff of nonpremixed laminar jet flames in a coflow
Authors:
Kim, Minkuk; Ryu, Seol; Won, Sanghee; Chung, Suk-Ho ( 0000-0001-8782-312X )
Abstract:
The stabilization characteristics of liftoff and blowoff in nonpremixed laminar jet flames in a coflow have been investigated experimentally for propane fuel by applying AC and DC electric fields to the fuel nozzle with a single-electrode configuration. The liftoff and blowoff velocities have been measured by varying the applied voltage and frequency of AC and the voltage and the polarity of DC. The result showed that the AC electric fields extended the stabilization regime of nozzle-attached flame in terms of jet velocity. As the applied AC voltage increased, the nozzle-attached flame was maintained even over the blowout velocity without having electric fields. In such a case, a blowoff occurred directly without experiencing a lifted flame. While for the DC cases, the influence on liftoff was minimal. There existed three different regimes depending on the applied AC voltage. In the low voltage regime, the nozzle-detachment velocity of either liftoff or blowoff increased linearly with the applied voltage, while nonlinearly with the AC frequency. In the intermediate voltage regime, the detachment velocity decreased with the applied voltage and reasonably independent of the AC frequency. At the high voltage regime, the detachment was significantly influenced by the generation of discharges. © 2009 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:
Jan-2010
DOI:
10.1016/j.combustflame.2009.10.002
Type:
Article
ISSN:
00102180
Sponsors:
This work was supported by HKCRC through IAMD and CCRC from KAUST. The authors would like to thank Prof. Yiguang JLI and Dr. Timothy Ombrello for their helpful suggestions.
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.authorRyu, Seolen
dc.contributor.authorWon, Sangheeen
dc.contributor.authorChung, Suk-Hoen
dc.date.accessioned2015-08-02T09:11:09Zen
dc.date.available2015-08-02T09:11:09Zen
dc.date.issued2010-01en
dc.identifier.issn00102180en
dc.identifier.doi10.1016/j.combustflame.2009.10.002en
dc.identifier.urihttp://hdl.handle.net/10754/561432en
dc.description.abstractThe stabilization characteristics of liftoff and blowoff in nonpremixed laminar jet flames in a coflow have been investigated experimentally for propane fuel by applying AC and DC electric fields to the fuel nozzle with a single-electrode configuration. The liftoff and blowoff velocities have been measured by varying the applied voltage and frequency of AC and the voltage and the polarity of DC. The result showed that the AC electric fields extended the stabilization regime of nozzle-attached flame in terms of jet velocity. As the applied AC voltage increased, the nozzle-attached flame was maintained even over the blowout velocity without having electric fields. In such a case, a blowoff occurred directly without experiencing a lifted flame. While for the DC cases, the influence on liftoff was minimal. There existed three different regimes depending on the applied AC voltage. In the low voltage regime, the nozzle-detachment velocity of either liftoff or blowoff increased linearly with the applied voltage, while nonlinearly with the AC frequency. In the intermediate voltage regime, the detachment velocity decreased with the applied voltage and reasonably independent of the AC frequency. At the high voltage regime, the detachment was significantly influenced by the generation of discharges. © 2009 The Combustion Institute.en
dc.description.sponsorshipThis work was supported by HKCRC through IAMD and CCRC from KAUST. The authors would like to thank Prof. Yiguang JLI and Dr. Timothy Ombrello for their helpful suggestions.en
dc.publisherElsevieren
dc.subjectBlowoffen
dc.subjectElectric fieldsen
dc.subjectLaminar jeten
dc.subjectLiftoffen
dc.subjectStabilizationen
dc.titleElectric fields effect on liftoff and blowoff of nonpremixed laminar jet flames in a coflowen
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.authorChung, Suk-Hoen
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