Cellular instabilities of expanding hydrogen/propane spherical flames at elevated pressures: Theory and experiment

Chung King Law, G. Jomaas, J. K. Bechtold

Research output: Contribution to journalConference articlepeer-review

236 Scopus citations

Abstract

An experimental and theoretical investigation of the onset of cellular instabilities on spherically expanding flames in mixtures of hydrogen and propane in air at elevated pressures was conducted. Critical conditions for the onset of instability were measured and mapped out over a range of pressures and mixture compositions. An asymptotic theory of hydrodynamic and diffusional-thermal cell development on flames in mixtures comprised of two scarce fuels burning in air was also formulated. Predicted values of Peclet number, defined as the flame radius at the onset of instability normalized by the flame thickness, were shown to compare favorably with the experimentally measured values.

Original languageEnglish (US)
Pages (from-to)159-167
Number of pages9
JournalProceedings of the Combustion Institute
Volume30
Issue number1
DOIs
StatePublished - 2005
Event30th International Symposium on Combustion - Chicago, IL, United States
Duration: Jul 25 2004Jul 30 2004

All Science Journal Classification (ASJC) codes

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

Keywords

  • Cellular flames
  • Flame instability
  • Hydrogen combustion

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