Near-lean limit combustion regimes of low-Lewis-number stretched premixed flames

Roman Fursenko, Sergey Minaev, Hisashi Nakamura, Takuya Tezuka, Susumu Hasegawa, Tomoya Kobayashi, Koichi Takase, Masato Katsuta, Masao Kikuchi, Kaoru Maruta

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Dynamic behavior and 3D spatial structure of low-Lewis-number counterflow premixed flames are numerically studied in the frame of thermo-diffusive model with one-step chemical reaction. The diverse combustion regimes are described and regions of existence of these regimes in equivalence ratio/stretch rate plane are identified. Qualitative comparison between numerical results and results of microgravity experiments are discussed. Experiments and numerical simulations demonstrate that at small stretch rate conditions lean low-Lewis-number counterflow flames can appear as a set of separate ball-like flames in a state of chaotic motion. The extension of extinction limits associated with existence of sporadic combustion regimes is observed.

Original languageEnglish
Pages (from-to)1712-1718
Number of pages7
JournalCombustion and Flame
Volume162
Issue number5
DOIs
Publication statusPublished - 2015 May 1

Keywords

  • Cellular flames
  • Counterflow premixed flames
  • Diffusive-thermal instability
  • Flame ball
  • Heat loss

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

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