Diffusive-thermal instability of stretched low-Lewis-number flames of slot-jet counterflow burners

Roman Fursenko, Sergey Mokrin, Sergey Minaev, Kaoru Maruta

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Characteristics and spatial structure of premixed low-Lewis-number flames in stretched flow of two slot burners were investigated numerically and theoretically using thermo-diffusive model with one-step chemical reaction. Three different combustion regimes were distinguished twin planar flames twin wrinkled flames and multiple flame tubes. in the latter case no continuous flame front surface was observed and combustion wave was represented by the set of separate reacting spots of tube-like form. Continuous flames e.g. wrinkled and planar twin flames appeared inside the C-shape extinction limit curve obtained in the frame of one-dimensional model while flame tubes appeared beyond this limit in the entire range of stretch rates. The extension of low-Lewis-number counterflow flame flammability limits is related with the possibility of formation of non-planar flame tube structure caused by the effect of diffusive-thermal instability.

Original languageEnglish
Pages (from-to)1613-1620
Number of pages8
JournalProceedings of the Combustion Institute
Volume36
Issue number1
DOIs
Publication statusPublished - 2017

Keywords

  • Diffusive-thermal instability
  • Flame tubes
  • Heat losses
  • Premixed cellular flames
  • Slot-jet counterflow burners

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Diffusive-thermal instability of stretched low-Lewis-number flames of slot-jet counterflow burners'. Together they form a unique fingerprint.

Cite this