Study of vortex core precession in combustion chambers

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

Результат исследований: Материалы для журналаСтатьярецензирование

4 Цитирования (Scopus)

Аннотация

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.

Язык оригиналаАнглийский
Страницы (с-по)679-686
Число страниц8
ЖурналThermophysics and Aeromechanics
Том20
Номер выпуска6
DOI
СостояниеОпубликовано - 1 дек 2013
Опубликовано для внешнего пользованияДа

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics

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