Hydrodynamic Instability of a Premixed Flame Under Confinement

J. L. McGreevy, M. Matalon

Research output: Contribution to journalArticle

Abstract

A linear stability analysis has been performed to identify the role of the hydrodynamic instability when combustion occurs in a closed tube. The model treats the flame as a surface of discontinuity in an otherwise inyiscid isentropic mixture. The burning rate is obtained from an analysis of the internal flame structure. It is shown that flame acceleration, a consequence of pressure buildup, has a damping influence on the long wavelength disturbances. Disturbances of shorter wavelengths grow but their growth rate exceeds the propagation speed, which can only then be identified as an instability. The growth rate is found to be always lower than the corresponding growth rate for a freely propagating flame.

Original languageEnglish (US)
Pages (from-to)75-94
Number of pages20
JournalCombustion science and technology
Volume100
Issue number1-6
DOIs
StatePublished - Jan 1 1994
Externally publishedYes

Fingerprint

premixed flames
flames
Hydrodynamics
hydrodynamics
Wavelength
Linear stability analysis
disturbances
combustion stability
burning rate
Damping
wavelengths
discontinuity
damping
tubes
propagation

ASJC Scopus subject areas

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

Cite this

Hydrodynamic Instability of a Premixed Flame Under Confinement. / McGreevy, J. L.; Matalon, M.

In: Combustion science and technology, Vol. 100, No. 1-6, 01.01.1994, p. 75-94.

Research output: Contribution to journalArticle

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