naa a22 4500 510758444 CHVBK 20180411083130.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1134/S0869864313060048 doi (NATIONALLICENCE)springer-10.1134/S0869864313060048 Study of vortex core precession in combustion chambers [Elektronische Daten] [S. Alekseenko, D. Markovich, V. Dulin, L. Chikishev] 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. Pleiades Publishing, Ltd., 2013 PIV nationallicence vortex core precession nationallicence swirling flames nationallicence Alekseenko S. Novosibirsk State University, Novosibirsk, Russia aut Markovich D. Novosibirsk State University, Novosibirsk, Russia aut Dulin V. Novosibirsk State University, Novosibirsk, Russia aut Chikishev L. Novosibirsk State University, Novosibirsk, Russia aut Thermophysics and Aeromechanics Kutateladze Institute of Thermophysics SB RAS 20/6(2013-12-01), 679-686 0869-8643 20:6<679 2013 20 11510 https://doi.org/10.1134/S0869864313060048 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0869864313060048 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Alekseenko S. Novosibirsk State University, Novosibirsk, Russia aut NATIONALLICENCE 700 1- Markovich D. Novosibirsk State University, Novosibirsk, Russia aut NATIONALLICENCE 700 1- Dulin V. Novosibirsk State University, Novosibirsk, Russia aut NATIONALLICENCE 700 1- Chikishev L. Novosibirsk State University, Novosibirsk, Russia aut NATIONALLICENCE 773 0- Thermophysics and Aeromechanics Kutateladze Institute of Thermophysics SB RAS 20/6(2013-12-01), 679-686 0869-8643 20:6<679 2013 20 11510 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer