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dc.contributor.authorKim, Hee J.
dc.contributor.authorVan, Kyuho
dc.contributor.authorLee, Dae K.
dc.contributor.authorYoo, Chun S.
dc.contributor.authorPark, Jeong
dc.contributor.authorChung, Suk Ho
dc.date.accessioned2020-02-12T13:18:08Z
dc.date.available2020-02-12T13:18:08Z
dc.date.issued2020-02-04
dc.date.submitted2019-08-02
dc.identifier.citationKim, H. J., Van, K., Lee, D. K., Yoo, C. S., Park, J., & Chung, S. H. (2020). Laminar flame speed, Markstein length, and cellular instability for spherically propagating methane/ethylene–air premixed flames. Combustion and Flame, 214, 464–474. doi:10.1016/j.combustflame.2020.01.011
dc.identifier.doi10.1016/j.combustflame.2020.01.011
dc.identifier.urihttp://hdl.handle.net/10754/661491
dc.description.abstractAn experimental study on laminar flame speed, Markstein length, and the onset of cellular instability was conducted by varying the equivalence ratio and ethylene/methane mixing ratio in spherically propagating premixed flames at ambient temperature and elevated pressures up to 0.8 MPa. Unstretched laminar burning velocities were first validated for methane − air flames by optimizing the range of the flame radius in testing linear and non-linear extrapolation models, and subsequently comparing the results with those simulated using four kinetic mechanisms. Based on the results, unstretched laminar burning velocities were determined for premixed flames of methane/ethylene mixture fuels. The predictability of theoretical Markstein lengths was appreciated by adopting a composite solution of the heat-release-weighted Lewis number and the temperature-dependent Zel'dovich number. Measured Markstein lengths were compared with those predicted based on a composite model for laminar flame speeds against flame radius. Depending on the fuels (methane or methane/ethylene mixture), pressure, and equivalence ratio, the predictability of the model varied. For methane − air flames, cellular instabilities were not observed within the observation window at pressures up to 0.6 MPa. Cell formation, caused by hydrodynamic instability, was enhanced by an increase in the ethylene ratio and chamber pressure. Theoretical critical flame radii for the onset of cellular instability predicted by the composite model were consistent with the measured ones for both lean and rich mixtures.
dc.description.sponsorshipThis work was conducted under the framework of the Research and Development Program of the Korea Institute of Energy Research (B9-2431). CSY was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (NRF-2018R1A2A2A05018901). SHC was supported by the King Abdullah University of Science and Technology (KAUST).
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0010218020300146
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, [[Volume], [Issue], (2020-02-04)] DOI: 10.1016/j.combustflame.2020.01.011 . © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleLaminar flame speed, Markstein length, and cellular instability for spherically propagating methane/ethylene–air premixed flames
dc.typeArticle
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.rights.embargodate2022-02-04
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Mechanical Engineering, Pukyong National University, Busan, Korea
dc.contributor.institutionAdvanced Combustion Lab, Korea Institute of Energy Research, Daejeon, Korea
dc.contributor.institutionDepartment of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Korea
kaust.personChung, Suk Ho
dc.date.accepted2020-01-10
refterms.dateFOA2020-02-20T05:46:41Z
dc.date.published-online2020-02-04
dc.date.published-print2020-04


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