Blowoff mechanism of harmonically forced bluff body stabilized turbulent premixed flames

Swetaprovo Chaudhuri, Stanislav Kostka, Michael W. Renfro, Baki M. Cetegen

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Flame blowoff under harmonic forcing of upstream mixture velocity is analyzed for bluff-body stabilized conical premixed flames in a laboratory burner. It is found that the forced vortex shedding phenomenon within the recirculation zone, accompanies flame blowoff when the convective wavelength of the imposed oscillation is larger than the recirculation zone length in the streamwise direction. The experimental results obtained from combined particle image velocimetry and planar laser induced fluorescence of OH radical provide evidence for this behavior. The differences between forced and unforced flame blowoff are also discussed.

Original languageEnglish
Pages (from-to)638-640
Number of pages3
JournalCombustion and Flame
Volume159
Issue number2
DOIs
StatePublished - Feb 2012

ASJC Scopus subject areas

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

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