Optical Diagnostics of Vortex Ring-Flame Interaction
V. A. Arbuzov1,2, E. V. Arbuzov2,3, N. A. Dvornikov1, Yu. N. Dubnishchev1,2, V. G. Nechaev2, E. O. Shlapakova2
1Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, pr. Lavrent’eva 1, Novosibirsk, 630090 Russia
2Novosibirsk State Technical University, pr. Karla Marksa 20, Novosibirsk, 630073 Russia
3Sobolev Institute of Mathematics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Koptyuga 4, Novosibirsk, 630090 Russia
Keywords: вихревое кольцо, факел, гильберт-визуализация вихревых структур, vortex ring, flame, Hilbert visualization of vortex structures
Pages: 161-166
Abstract
The interaction of a cold vortex ring with flame in an axisymmetric configuration has been investigated using methods of Hilbert optics, shearing interferometry, and numerical simulation. The impact of a cold vortex ring formed by a pressure pulse from the annular area surrounding the source on the flame has been numerically simulated. The modes of breakup of the flame structure, blow-off, and quenching under various conditions of vortex ring formation were identified. It is shown that in the case of both complete and partial quenching, most of the flame is blown off. However, in the case of incomplete quenching of the flame, in its lower part there is a small combustion zone, which then grows back to the previous size.
DOI: http://dx.doi.org/10.3103/S8756699016020084
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