Study of vortex core precession in combustion chambers

S. V. Alekseenko, D. M. Markovich, V. M. Dulin, L. M. Chikishev

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4 Citations (Scopus)

Abstract

The article presents the results of experimental investigation of swirling flow of lean propane/air flame in a model combustion chamber at atmospheric pressure. To study the unsteady turbulent flow, the particle image velocimetry technique was used. It was concluded that dynamics of high swirl flows with and without combustion was determined by a global helical mode, complying with a precessing double-spiral coherent vortex structure. The studied low swirl flame had similar size and stability characteristics, but amplitude of the coherent helical structure substantially oscillated in time. The oscillations were associated with intermittently appearing central recirculation zone that was absent in the nonreacting flow. It is expected that the low swirl flow without the permanent central recirculation zone should be more sensitive to an external active control. In particular, this result may be useful for suppression of thermoacoustic resonance in combustion chambers.

Original languageEnglish
Pages (from-to)679-686
Number of pages8
JournalThermophysics and Aeromechanics
Volume20
Issue number6
DOIs
Publication statusPublished - 1 Dec 2013
Externally publishedYes

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Keywords

  • PIV
  • swirling flames
  • vortex core precession

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics

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