Cellular and sporadic flame regimes of low-Lewis-number stretched premixed flames

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

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

3D structure and dynamical behavior of low-Lewis-number stretched premixed flames are numerically simulated within the framework of a thermo-diffusive model with one-step chemical reaction. The results are compared with microgravity experiments at qualitative level. The influence of Lewis number, equivalence ratio, and heat loss intensity on flame structure is investigated. It is experimentally and numerically found that lean counterflow flames can appear as a set of separate ball-like flames in a state of chaotic motion. It is shown that the time averaged flame balls coordinate may be considered as important characteristic similar to coordinate of continuous flame front. Numerical simulations reveal essential incompleteness of combustion at high level of heat losses. This incompleteness occurs in the process of lean mixtures combustion and is caused by fuel leakage through the gaps among ball-like flames.

Original languageEnglish
Pages (from-to)981-988
Number of pages8
JournalProceedings of the Combustion Institute
Volume34
Issue number1
DOIs
Publication statusPublished - 2013

Keywords

  • Counterflow flames
  • Flame balls
  • Heat losses
  • Premixed cellular flames
  • Thermal-diffusion instability

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Physical and Theoretical Chemistry

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