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dc.contributor.authorGuiberti, Thibault
dc.contributor.authorBoyette, W. R.
dc.contributor.authorElbaz, Ayman M.
dc.contributor.authorMasri, A. R.
dc.contributor.authorRoberts, William L.
dc.date.accessioned2020-12-31T08:37:21Z
dc.date.available2020-12-31T08:37:21Z
dc.date.issued2017-01-01
dc.identifier.urihttp://hdl.handle.net/10754/666787
dc.description.abstractIn this study, the lift-off behavior of non-premixed turbulent jet flames (120 kPa to 500 kPa) is explored at elevated pressures, extending the current knowledge limited to sub-atmospheric and atmospheric pressure conditions. Experiments are conducted in the high-pressure combustion duct (HPCD) available at CCRC-KAUST. Flames are issued from a 4.58 mm inner diameter nozzle using methane as fuel and are maintained within an air coflow featuring a 0.6 m.s-1 velocity. Results show that, regardless of pressure, if the fuel jet velocity U exceeds a critical value, detachment occurs and flames are lifted and stabilized at a height h above the nozzle. The velocity leading to detachment decreases with pressure. Regardless of pressure, if the fuel jet velocity U is further increased after detachment the lift-off height h increases linearly. However, it is observed that the slope of the h(U) curve is insensitive to pressure if p ≤ 300 kPa but decreases rapidly with pressure if p > 300 kPa. One-dimensional laminar flames calculations are conducted to understand the influence of pressure on important properties of methane/air flames such as their laminar flame speed and extinction strain rate. These results are used to explain the experimental observations.
dc.description.sponsorshipThis work is supported by CCRC-KAUST.
dc.publisherEastern States Section of the Combustion Institute
dc.relation.urlhttps://research.kaust.edu.sa/en/publications/lift-off-of-non-premixed-turbulent-chsub4sub-jet-flames-at-elevat
dc.rightsArchived with thanks to Eastern States Section of the Combustion Institute
dc.titleLift-off of non-premixed turbulent CH4 jet flames at elevated pressures
dc.typeConference Paper
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentClean Combustion Research Center, KAUST, Thuwal, 23955, Saudi Arabia
dc.contributor.departmentMechanical Engineering Program
dc.conference.date2017-04-23 to 2017-04-26
dc.conference.name10th U.S. National Combustion Meeting
dc.conference.locationCollege Park, MD, USA
dc.eprint.versionPre-print
dc.contributor.institutionSchool of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, NSW, 2006, Australia
dc.identifier.volume2017-April
kaust.personGuiberti, Thibault
kaust.personBoyette, W. R.
kaust.personElbaz, Ayman M.
kaust.personRoberts, William L.
dc.identifier.eid2-s2.0-85049080427


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