Characteristics of autoignited laminar lifted flames in heated coflow jets of carbon monoxide/hydrogen mixtures

Handle URI:
http://hdl.handle.net/10754/562216
Title:
Characteristics of autoignited laminar lifted flames in heated coflow jets of carbon monoxide/hydrogen mixtures
Authors:
Choi, Byungchul; Chung, Suk-Ho ( 0000-0001-8782-312X )
Abstract:
The characteristics of autoignited lifted flames in laminar jets of carbon monoxide/hydrogen fuels have been investigated experimentally in heated coflow air. In result, as the jet velocity increased, the blowoff was directly occurred from the nozzle-attached flame without experiencing a stabilized lifted flame, in the non-autoignited regime. In the autoignited regime, the autoignited lifted flame of carbon monoxide diluted by nitrogen was affected by the water vapor content in the compressed air oxidizer, as evidenced by the variation of the ignition delay time estimated by numerical calculation. In particular, in the autoignition regime at low temperatures with added hydrogen, the liftoff height of the autoignited lifted flames decreased and then increased as the jet velocity increased. Based on the mechanism in which the autoignited laminar lifted flame is stabilized by ignition delay time, the liftoff height can be influenced not only by the heat loss, but also by the preferential diffusion between momentum and mass diffusion in fuel jets during the autoignition process. © 2012 The Korean Society of Mechanical Engineers.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Combustion and Laser Diagnostics Laboratory
Journal:
Transactions of the Korean Society of Mechanical Engineers, B
Issue Date:
1-Jun-2012
DOI:
10.3795/KSME-B.2012.36.6.639
Type:
Article
ISSN:
12264881
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.authorChoi, Byungchulen
dc.contributor.authorChung, Suk-Hoen
dc.date.accessioned2015-08-03T09:56:40Zen
dc.date.available2015-08-03T09:56:40Zen
dc.date.issued2012-06-01en
dc.identifier.issn12264881en
dc.identifier.doi10.3795/KSME-B.2012.36.6.639en
dc.identifier.urihttp://hdl.handle.net/10754/562216en
dc.description.abstractThe characteristics of autoignited lifted flames in laminar jets of carbon monoxide/hydrogen fuels have been investigated experimentally in heated coflow air. In result, as the jet velocity increased, the blowoff was directly occurred from the nozzle-attached flame without experiencing a stabilized lifted flame, in the non-autoignited regime. In the autoignited regime, the autoignited lifted flame of carbon monoxide diluted by nitrogen was affected by the water vapor content in the compressed air oxidizer, as evidenced by the variation of the ignition delay time estimated by numerical calculation. In particular, in the autoignition regime at low temperatures with added hydrogen, the liftoff height of the autoignited lifted flames decreased and then increased as the jet velocity increased. Based on the mechanism in which the autoignited laminar lifted flame is stabilized by ignition delay time, the liftoff height can be influenced not only by the heat loss, but also by the preferential diffusion between momentum and mass diffusion in fuel jets during the autoignition process. © 2012 The Korean Society of Mechanical Engineers.en
dc.subjectAutoignitionen
dc.subjectCarbon Monoxideen
dc.subjectHydrogenen
dc.subjectLifted Flameen
dc.titleCharacteristics of autoignited laminar lifted flames in heated coflow jets of carbon monoxide/hydrogen mixturesen
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.journalTransactions of the Korean Society of Mechanical Engineers, Ben
dc.contributor.institutionEnvironment and Plant Team, South Koreaen
kaust.authorChung, Suk-Hoen
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