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dc.contributor.authorWang, Qiang
dc.contributor.authorHu, Longhua
dc.contributor.authorYoon, Sung Hwan
dc.contributor.authorLu, Shouxiang
dc.contributor.authorDelichatsios, Michael
dc.contributor.authorChung, Suk Ho
dc.date.accessioned2015-08-17T07:42:41Z
dc.date.available2015-08-17T07:42:41Z
dc.date.issued2015-07-22
dc.identifier.citationBlow-out limits of nonpremixed turbulent jet flames in a cross flow at atmospheric and sub-atmospheric pressures 2015 Combustion and Flame
dc.identifier.issn00102180
dc.identifier.doi10.1016/j.combustflame.2015.06.012
dc.identifier.urihttp://hdl.handle.net/10754/567061
dc.description.abstractThe blow-out limits of nonpremixed turbulent jet flames in cross flows were studied, especially concerning the effect of ambient pressure, by conducting experiments at atmospheric and sub-atmospheric pressures. The combined effects of air flow and pressure were investigated by a series of experiments conducted in an especially built wind tunnel in Lhasa, a city on the Tibetan plateau where the altitude is 3650 m and the atmospheric pressure condition is naturally low (64 kPa). These results were compared with results obtained from a wind tunnel at standard atmospheric pressure (100 kPa) in Hefei city (altitude 50 m). The size of the fuel nozzles used in the experiments ranged from 3 to 8 mm in diameter and propane was used as the fuel. It was found that the blow-out limit of the air speed of the cross flow first increased (“cross flow dominant” regime) and then decreased (“fuel jet dominant” regime) as the fuel jet velocity increased in both pressures; however, the blow-out limit of the air speed of the cross flow was much lower at sub-atmospheric pressure than that at standard atmospheric pressure whereas the domain of the blow-out limit curve (in a plot of the air speed of the cross flow versus the fuel jet velocity) shrank as the pressure decreased. A theoretical model was developed to characterize the blow-out limit of nonpremixed jet flames in a cross flow based on a Damköhler number, defined as the ratio between the mixing time and the characteristic reaction time. A satisfactory correlation was obtained at relative strong cross flow conditions (“cross flow dominant” regime) that included the effects of the air speed of the cross flow, fuel jet velocity, nozzle diameter and pressure.
dc.language.isoen
dc.publisherElsevier BV
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0010218015001935
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Combustion and Flame. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Combustion and Flame, 22 July 2015. DOI: 10.1016/j.combustflame.2015.06.012
dc.subjectNonpremixed turbulent jet flame
dc.subjectCross flow
dc.subjectBlow-out limit
dc.subjectPressure effect
dc.titleBlow-out limits of nonpremixed turbulent jet flames in a cross flow at atmospheric and sub-atmospheric pressures
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.eprint.versionPost-print
dc.contributor.institutionState Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, China
dc.contributor.institutionDivision of Mechanical and Space Engineering, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido, Japan
dc.contributor.institutionFireSERT, School of Built Environment, University of Ulster, Newtownabbey BT38 8GQ, Ireland
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personChung, Suk Ho
refterms.dateFOA2017-07-22T00:00:00Z
dc.date.published-online2015-07-22
dc.date.published-print2015-10


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