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This article is cited in 26 scientific papers (total in 26 papers)
Splitting flames in a narrow channel with a temperature gradient in the walls
S. S. Minaeva, E. V. Sereshchenkoa, R. V. Fursenkoa, A. Fanb, K. Marutab a Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090, Russia
b Institute of Fluid Science, Tohoku University, Sedai, Japan, 980-8577
Abstract:
A possibility of simultaneous formation of two chemical reaction fronts during nonstationary combustion of a gas in a microchannel with a temperature gradient in the walls is demonstrated. Combustion in a straight tube and in a gap between two disks with radial fuel injection is considered. In both cases, the characteristic transverse size of the channel is smaller than the critical diameter determined for the ambient temperature, and gas combustion occurs in the region where the wall temperature is higher than the ambient temperature. A numerical study of flame repetitive extinction/ignition (FREI) demonstrated a possibility of simultaneous formation of two chemical reaction fronts in the hot region of the channel. One front corresponds to conventional flame propagating upstream from the hot to the cold part of the channel, and the other front moves in the downstream direction and decays as the fuel burns out. Based on this study, a new mechanism of ignition and incomplete combustion of the combustible mixture in microsystems is proposed.
Keywords:
microcombustion, instability, ignition, incomplete combustion of the mixture.
Received: 18.04.2008
Citation:
S. S. Minaev, E. V. Sereshchenko, R. V. Fursenko, A. Fan, K. Maruta, “Splitting flames in a narrow channel with a temperature gradient in the walls”, Fizika Goreniya i Vzryva, 45:2 (2009), 12–19; Combustion, Explosion and Shock Waves, 45:2 (2009), 119–125
Linking options:
https://www.mathnet.ru/eng/fgv1268 https://www.mathnet.ru/eng/fgv/v45/i2/p12
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