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  1. B200 工学部/工学研究科
  2. B200a 雑誌掲載論文
  3. 学術雑誌

Flame structure and flame spread rate over a solid fuel in partially premixed atmospheres

http://hdl.handle.net/2237/20040
033acd1c-ed11-462b-af24-d17b31aeb38c
名前 / ファイル ライセンス アクション
93.pdf 93.pdf (587.8 kB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2014-05-23
タイトル
タイトル Flame structure and flame spread rate over a solid fuel in partially premixed atmospheres
著者 Yamamoto, Kazuhiro

× Yamamoto, Kazuhiro

WEKO 52371

Yamamoto, Kazuhiro

Search repository
Ogata, Yoshinori

× Ogata, Yoshinori

WEKO 52372

Ogata, Yoshinori

Search repository
Yamashita, Hiroshi

× Yamashita, Hiroshi

WEKO 52373

Yamashita, Hiroshi

Search repository
権利
権利情報 This is the author's version of a work that was accepted for publication in Proceedings of the Combustion Institute. 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 Proceedings of the Combustion Institute. v.33, n.2, 2011, p.2441–2448, DOI: http://dx.doi.org/10.1016/j.proci.2010.06.089
キーワード
主題Scheme Other
主題 Flame spread
キーワード
主題Scheme Other
主題 Solid fuel
キーワード
主題Scheme Other
主題 Partially premixed flame
キーワード
主題Scheme Other
主題 Flame index
キーワード
主題Scheme Other
主題 Lewis number
抄録
内容記述 We have investigated the downward flame spread over a thin solid fuel. Hydrogen, methane, or propane, included in the gaseous product of pyrolysis reaction, is added in the ambient air. The fuel concentration is kept below the lean flammability limit to observe the partially premixing effect. Both experimental and numerical studies have been conducted. Results show that, in partially premixed atmospheres, both blue flame and luminous flame regions are enlarged, and the flame spread rate is increased. Based on the flame index, a so-called triple flame is observed. The heat release rate ahead of the original diffusion flame is increased by adding the fuel, and its profile is moved upstream. Here, we focus on the heat input by adding the fuel in the opposed air, which could be a direct factor to intensify the combustion reaction. The dependence of the flame spread rate on the heat input is almost the same for methane and propane/air mixtures, but larger effect is observed for hydrogen/air mixture. Since the deficient reactant in lean mixture is fuel, the larger effect of hydrogen could be explained based on the Lewis number consideration. That is, the combustion is surely intensified for all cases, but this effect is larger for lean hydrogen/air mixture (Le < 1), because more fuel diffuses toward the lean premixed flame ahead of the original diffusion flame. Resultantly, the pyrolysis reaction is promoted to support the higher flame spread rate.
内容記述タイプ Abstract
出版者
出版者 Elsevier
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
ISSN
収録物識別子タイプ ISSN
収録物識別子 1540-7489
書誌情報 Proceedings of the Combustion Institute

巻 33, 号 2, p. 2441-2448, 発行日 2011
著者版フラグ
値 author
URI
識別子 http://dx.doi.org/10.1016/j.proci.2010.06.089
識別子タイプ DOI
URI
識別子 http://hdl.handle.net/2237/20040
識別子タイプ HDL
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