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dc.contributor.authorChoi, Byungchul
dc.contributor.authorChung, Suk Ho
dc.date.accessioned2015-08-04T07:12:06Z
dc.date.available2015-08-04T07:12:06Z
dc.date.issued2013-01
dc.identifier.citationChoi, B. C., & Chung, S. H. (2013). An experimental study on turbulent lifted flames of methane in coflow jets at elevated temperatures. Fuel, 103, 956–962. doi:10.1016/j.fuel.2012.07.022
dc.identifier.issn00162361
dc.identifier.doi10.1016/j.fuel.2012.07.022
dc.identifier.urihttp://hdl.handle.net/10754/564680
dc.description.abstractAn experimental study was conducted on the effects of initial temperature variation on the stabilization characteristics of turbulent nonpremixed flames in coflow jets of methane fuel diluted by nitrogen. The typical behavior seen in the study showed that the liftoff height increased linearly with the jet velocity regardless of the initial temperature in the turbulent regime. Two models were investigated for predicting liftoff heights in the methane jets: the premixed flame model and the large-scale mixing model. For the premixed flame model, the liftoff heights in the methane jets were accurately predicted using the thermal diffusivity of the unburned gas temperature αst,0, instead of that of the burned gas temperature αst,b. For the large-scale mixing model, however, the prediction of liftoff heights differed slightly for the various fuel mole fractions. However, when considering the initial fuel mass fraction YF,0, the liftoff heights were successfully predicted. This result implies that the characteristics of the unburned fuel-air mixture play a crucial role for flame stabilization in coflow jets for a variety of initial conditions. In the turbulent regime, the blowout velocity and the liftoff height at blowout could be accurately predicted by the two models based on a consideration of the physical properties and the buoyancy effect of the initial temperature variation. © 2012 Elsevier Ltd. All rights reserved.
dc.publisherElsevier BV
dc.subjectCoflow jet
dc.subjectInitial temperature
dc.subjectLiftoff height
dc.subjectMethane
dc.subjectTurbulent lifted flame
dc.titleAn experimental study on turbulent lifted flames of methane in coflow jets at elevated temperatures
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.journalFuel
dc.contributor.institutionEnvironment and Plant Team, Korean Register of Shipping, Daejeon, South Korea
kaust.personChung, Suk Ho


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