Dynamics of flow–soot interaction in wrinkled non-premixed ethylene–air flames

Handle URI:
http://hdl.handle.net/10754/594079
Title:
Dynamics of flow–soot interaction in wrinkled non-premixed ethylene–air flames
Authors:
Arias, Paul G.; Lecoustre, Vivien R.; Roy, Somesh; Luo, Zhaoyu; Haworth, Daniel C.; Lu, Tianfeng; Trouvé, Arnaud; Im, Hong G. ( 0000-0001-7080-1266 )
Abstract:
A two-dimensional simulation of a non-premixed ethylene–air flame was conducted by employing a detailed gas-phase reaction mechanism considering polycyclic aromatic hydrocarbons, an aerosol-dynamics-based soot model using a method of moments with interpolative closure, and a grey gas and soot radiation model using the discrete transfer method. Interaction of the sooting flame with a prescribed decaying random velocity field was investigated, with a primary interest in the effects of velocity fluctuations on the flame structure and the associated soot formation process for a fuel-strip configuration and a composition with mature soot growth. The temporally evolving simulation revealed a multi-layered soot formation process within the flame, at a level of detail not properly described by previous studies based on simplified soot models utilizing acetylene or naphthalene precursors for initial soot inception. The overall effect of the flame topology on the soot formation was found to be consistent with previous experimental studies, while a unique behaviour of localised strong oxidation was also noted. The imposed velocity fluctuations led to an increase of the scalar dissipation rate in the sooting zone, causing a net suppression in the soot production rate. Considering the complex structure of the soot formation layer, the effects of the imposed fluctuations vary depending on the individual soot reactions. For the conditions under study, the soot oxidation reaction was identified as the most sensitive to the fluctuations and was mainly responsible for the local suppression of the net soot production. © 2015 Taylor & Francis
KAUST Department:
Clean Combustion Research Center
Citation:
Arias PG, Lecoustre VR, Roy S, Luo Z, Haworth DC, et al. (2015) Dynamics of flow–soot interaction in wrinkled non-premixed ethylene–air flames. Combustion Theory and Modelling 19: 568–586. Available: http://dx.doi.org/10.1080/13647830.2015.1067331.
Publisher:
Informa UK Limited
Journal:
Combustion Theory and Modelling
Issue Date:
17-Aug-2015
DOI:
10.1080/13647830.2015.1067331
Type:
Article
ISSN:
1364-7830; 1741-3559
Sponsors:
National Science Foundation[OCI-0904649, OCI-0904771, OCI-0904660, OCI-0904480]
Appears in Collections:
Articles; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorArias, Paul G.en
dc.contributor.authorLecoustre, Vivien R.en
dc.contributor.authorRoy, Someshen
dc.contributor.authorLuo, Zhaoyuen
dc.contributor.authorHaworth, Daniel C.en
dc.contributor.authorLu, Tianfengen
dc.contributor.authorTrouvé, Arnauden
dc.contributor.authorIm, Hong G.en
dc.date.accessioned2016-01-19T13:21:06Zen
dc.date.available2016-01-19T13:21:06Zen
dc.date.issued2015-08-17en
dc.identifier.citationArias PG, Lecoustre VR, Roy S, Luo Z, Haworth DC, et al. (2015) Dynamics of flow–soot interaction in wrinkled non-premixed ethylene–air flames. Combustion Theory and Modelling 19: 568–586. Available: http://dx.doi.org/10.1080/13647830.2015.1067331.en
dc.identifier.issn1364-7830en
dc.identifier.issn1741-3559en
dc.identifier.doi10.1080/13647830.2015.1067331en
dc.identifier.urihttp://hdl.handle.net/10754/594079en
dc.description.abstractA two-dimensional simulation of a non-premixed ethylene–air flame was conducted by employing a detailed gas-phase reaction mechanism considering polycyclic aromatic hydrocarbons, an aerosol-dynamics-based soot model using a method of moments with interpolative closure, and a grey gas and soot radiation model using the discrete transfer method. Interaction of the sooting flame with a prescribed decaying random velocity field was investigated, with a primary interest in the effects of velocity fluctuations on the flame structure and the associated soot formation process for a fuel-strip configuration and a composition with mature soot growth. The temporally evolving simulation revealed a multi-layered soot formation process within the flame, at a level of detail not properly described by previous studies based on simplified soot models utilizing acetylene or naphthalene precursors for initial soot inception. The overall effect of the flame topology on the soot formation was found to be consistent with previous experimental studies, while a unique behaviour of localised strong oxidation was also noted. The imposed velocity fluctuations led to an increase of the scalar dissipation rate in the sooting zone, causing a net suppression in the soot production rate. Considering the complex structure of the soot formation layer, the effects of the imposed fluctuations vary depending on the individual soot reactions. For the conditions under study, the soot oxidation reaction was identified as the most sensitive to the fluctuations and was mainly responsible for the local suppression of the net soot production. © 2015 Taylor & Francisen
dc.description.sponsorshipNational Science Foundation[OCI-0904649, OCI-0904771, OCI-0904660, OCI-0904480]en
dc.publisherInforma UK Limiteden
dc.subjectdirect numerical simulationen
dc.subjectmoment methoden
dc.subjectnon-premixed flamesen
dc.subjectsoot formationen
dc.subjectturbulenceen
dc.titleDynamics of flow–soot interaction in wrinkled non-premixed ethylene–air flamesen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalCombustion Theory and Modellingen
dc.contributor.institutionUniversity of Maryland, College Park, USAen
dc.contributor.institutionPennsylvania State University, University Park, USAen
dc.contributor.institutionUniversity of Connecticut, Storrs, USAen
kaust.authorArias, Paul G.en
kaust.authorIm, Hong G.en
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