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dc.contributor.authorChoi, Byungchul
dc.contributor.authorChung, Suk Ho
dc.date.accessioned2015-08-03T09:45:44Z
dc.date.available2015-08-03T09:45:44Z
dc.date.issued2012-04
dc.identifier.citationChoi, B. C., & Chung, S. H. (2012). Autoignited laminar lifted flames of methane/hydrogen mixtures in heated coflow air. Combustion and Flame, 159(4), 1481–1488. doi:10.1016/j.combustflame.2011.11.016
dc.identifier.issn00102180
dc.identifier.doi10.1016/j.combustflame.2011.11.016
dc.identifier.urihttp://hdl.handle.net/10754/562140
dc.description.abstractAutoignited lifted flame behavior in laminar jets of methane/hydrogen mixture fuels has been investigated experimentally in heated coflow air. Three regimes of autoignited lifted flames were identified depending on initial temperature and hydrogen to methane ratio. At relatively high initial temperature, addition of a small amount of hydrogen to methane improved ignition appreciably such that the liftoff height decreased significantly. In this hydrogen-assisted autoignition regime, the liftoff height increased with jet velocity, and the characteristic flow time - defined as the ratio of liftoff height to jet velocity - correlated well with the square of the adiabatic ignition delay time. At lower temperature, the autoignited lifted flame demonstrated a unique feature in that the liftoff height decreased with increasing jet velocity. Such behavior has never been observed in lifted laminar and turbulent jet flames. A transition regime existed between these two regimes at intermediate temperature. © 2011 The Combustion Institute.
dc.description.sponsorshipThis work was supported by Saudi Aramco through KAUST CCRC. We are thankful to Drs. Tidjani Niass and Amer Amer for their helpful suggestions.
dc.publisherElsevier BV
dc.subjectAutoignition
dc.subjectIgnition delay
dc.subjectLiftoff height
dc.subjectMild combustion
dc.subjectSchmidt number
dc.subjectTribrachial flame
dc.titleAutoignited laminar lifted flames of methane/hydrogen mixtures in heated coflow air
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.journalCombustion and Flame
dc.contributor.institutionEnvironment and Plant Team, Korean Register of Shipping, Daejeon, South Korea
kaust.personChoi, Byungchul
kaust.personChung, Suk Ho


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