Behaviors of tribrachial edge flames and their interactions in a triple-port burner

Handle URI:
http://hdl.handle.net/10754/566079
Title:
Behaviors of tribrachial edge flames and their interactions in a triple-port burner
Authors:
Yamamoto, Kazuhiro; Isobe, Yusuke; Hayashi, Naoki; Yamashita, Hiroshi; Chung, Suk-Ho ( 0000-0001-8782-312X )
Abstract:
In a triple-port burner, various non-premixed flames have been observed previously. Especially for the case with two lifted flames, such configuration could be suitable in studying interaction between two tribrachial flames. In the present study, the flame characteristics have been investigated numerically by adopting a reduced kinetic mechanism in the triple-port burner. Four different types of flame configurations, including two attached flames, inner lifted/outer attached flames, inner attached/outer lifted flames, and twin lifted flames, were successfully simulated depending on the flow conditions. The representative edge propagation speed of a single lifted flame or an upstream lifted flame in the case of twin lifted flames increased as the liftoff height became higher. In the twin lifted flames, the inner lifted flame was affected appreciably when the other flame was located further upstream such that the lifted flame located further downstream encountered the axial velocity acceleration induced by the gas expansion from the lifted flame located upstream, while thermal effects were not observed since the temperature of the incoming flow toward the lifted flame was not affected. A unique flip-flop behavior between the inner and outer flames, observed experimentally previously, was successfully captured in the simulation such that the inner lifted flame became attached to the nozzle as the liftoff height of the outer lifted flame grew higher with an increase in the outer air velocity.
KAUST Department:
Clean Combustion Research Center
Publisher:
Elsevier BV
Journal:
Combustion and Flame
Issue Date:
May-2015
DOI:
10.1016/j.combustflame.2014.11.028
Type:
Article
ISSN:
00102180
Appears in Collections:
Articles; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorYamamoto, Kazuhiroen
dc.contributor.authorIsobe, Yusukeen
dc.contributor.authorHayashi, Naokien
dc.contributor.authorYamashita, Hiroshien
dc.contributor.authorChung, Suk-Hoen
dc.date.accessioned2015-08-12T09:27:24Zen
dc.date.available2015-08-12T09:27:24Zen
dc.date.issued2015-05en
dc.identifier.issn00102180en
dc.identifier.doi10.1016/j.combustflame.2014.11.028en
dc.identifier.urihttp://hdl.handle.net/10754/566079en
dc.description.abstractIn a triple-port burner, various non-premixed flames have been observed previously. Especially for the case with two lifted flames, such configuration could be suitable in studying interaction between two tribrachial flames. In the present study, the flame characteristics have been investigated numerically by adopting a reduced kinetic mechanism in the triple-port burner. Four different types of flame configurations, including two attached flames, inner lifted/outer attached flames, inner attached/outer lifted flames, and twin lifted flames, were successfully simulated depending on the flow conditions. The representative edge propagation speed of a single lifted flame or an upstream lifted flame in the case of twin lifted flames increased as the liftoff height became higher. In the twin lifted flames, the inner lifted flame was affected appreciably when the other flame was located further upstream such that the lifted flame located further downstream encountered the axial velocity acceleration induced by the gas expansion from the lifted flame located upstream, while thermal effects were not observed since the temperature of the incoming flow toward the lifted flame was not affected. A unique flip-flop behavior between the inner and outer flames, observed experimentally previously, was successfully captured in the simulation such that the inner lifted flame became attached to the nozzle as the liftoff height of the outer lifted flame grew higher with an increase in the outer air velocity.en
dc.publisherElsevier BVen
dc.subjectLifted flameen
dc.subjectLiftoff heighten
dc.subjectNon-premixed flameen
dc.subjectNumerical simulationen
dc.subjectTribrachial edge flameen
dc.titleBehaviors of tribrachial edge flames and their interactions in a triple-port burneren
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalCombustion and Flameen
dc.contributor.institutionDepartment of Mechanical Science and Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japanen
kaust.authorChung, Suk-Hoen
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