Flame acceleration in long narrow open channels

Vadim N. Kurdyumov, Moshe Matalon

Research output: Contribution to journalArticle

Abstract

We study the propagation of premixed flames in long but finite channels, when the mixture is ignited at one end and both ends remain open and exposed to atmospheric pressure. Thermal expansion produces a continuous flow of burned gas directed away from the flame and towards the end of the channel where ignition took place. Owing to viscous drag, the flow is retarded at the walls and accelerated in the center, producing a pressure gradient that pushes the unburned gas ahead of the flame towards the other end of the channel. As a result the flame accelerates when it travels from end to end of the channel. The total travel time depends on the length of the channel and is proportional to γ-1ln(1 + γ), where c is the heat release parameter.

Original languageEnglish (US)
Pages (from-to)865-872
Number of pages8
JournalProceedings of the Combustion Institute
Volume34
Issue number1
DOIs
StatePublished - 2013

Keywords

  • Flame acceleration
  • Flame propagation in tubes
  • Premixed flames

ASJC Scopus subject areas

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

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