On hydrodynamic instability of stretched flames

Y. Kortsarts*, I. Brailovsky, G. I. Sivashinsky

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The recent result on the diffusive instability of a planar premixed gas flame sustained in the stagnation-point flow are carried over on the hydrodynamic (Darrieus-Landau) instability. Similar to the former case the planar flame of the infinite aspect length-scale is unconditionally stable for any flow induced stretch however small. Yet in finite geometries occuring in numerical and laboratory experiments the flame may well become unstable provided the imposed stretch is weak enough. It is argued that the effect may be related to the formation of a non-steady multiple cusp structure often observed in large-scale flames.

Original languageEnglish
Pages (from-to)207-225
Number of pages19
JournalCombustion Science and Technology
Volume123
Issue number1-6
DOIs
StatePublished - 1997

Funding

FundersFunder number
US Department of EnergyDE-FG2-88ERI382
US National Science FoundationCTS-9521084
US-Israel Binational Science Foundation95-0001 I
Israel Science Foundation15-95-1

    Keywords

    • Counterflow flames
    • Instabilities in flames

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