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Study of vortex breakdown in swirling premixed flames by high-repetition stereoscopic PIV

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.2010
pages 1963-1974

Sergey Alekseenko
Kutateladze Institute of Thermophysics SB RAS, Lavrentyev Ave. 1, 630090, Novosibirsk, Russia; Department of Physics, Novosibirsk State University

L. M. Chikishev
S.S. Kutateladze Institute of Thermophysics, Siberian Branch of RAS 1 Ak. Lavrentyev Avenue, 630090, Novosibirsk; Novosibirsk State University, 2 Pirogova Street, 630090, Novosibirsk

Vladimir M. Dulin
Kutateladze Institute of Thermophysics, 1, Lavrentyev Avenue, Novosibirsk, 630090, Russia; Department of Science and Research, Novosibirsk State University 2, Pirogova Street, 630090, Russia

Dmitriy M. Markovich
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences (IT SB RAS), 1, Lavrentyev Ave., Novosibirsk, 630090, Russia; Department of Physics, Novosibirsk State University (NSU), 1, Pirogov Str., Novosibirsk, 630090, Russia; Institute of Power Engineering, Tomsk Polytechnic University (TPU), 30, Lenin Ave., Tomsk, 634050, Russia


Flow structure of premixed propane-air and methane-air swirling flames was investigated by means of high-repetition stereoscopic PIV measurements. Weakly swirling flames with a U-shaped front and strongly swirling flames with a quasi-tubular front were studied. The rate of swirl was classified in terms of the absence/presence of stable recirculation zone for the non-reacting flows. Spatial distributions of the time-averaged velocity and Reynolds stresses, calculated on the basis of the instantaneous velocity fields, revealed that the structure of vortex breakdown in the visually similar flames differed dramatically.

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