Dynamics of flame propagation from localized ignition in rich hydrogen/air mixtures: Effects of elevated pressure and temperature

Stephen D. Tse, Hong Zhao

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

A computational study on expanding spherical premixed flames was conducted to investigate the dynamics of the stretch-affected, one-dimensional, and pulsating instability. Using a time-dependent, spherically symmetric code with detailed chemistry, transport, and radiation submodels, rich H2/air mixtures were investigated. It was shown that the dynamics of spherically expanding flames was significantly different than that for planar flames. It was suggested that any consideration of flame propagation ignition must address the competition between excess enthalpy from external energy deposition and stretch/heat-loss-affected pulsation instability.

Original languageEnglish (US)
Pages (from-to)559-578
Number of pages20
JournalCombustion Science and Technology
Volume177
Issue number3
DOIs
StatePublished - Mar 1 2005

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All Science Journal Classification (ASJC) codes

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

Keywords

  • Flame propagation
  • Flammability limits
  • Ignition
  • Instability
  • Spherical flames

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