Abstract
Ignition of a stoichiometric CH4: O2 mixture by a laser spark excited in the reactor volume is studied experimentally. It is found that the spark initiates a feebly radiating incomplete-combustion wave, which is much faster than the combustion wave, but is substantially slower than the detonation wave. With a time delay of 500–700 μs, a bright optical flash occupying the entire chamber volume is observed, which indicates fast (involving branching chain reactions) ignition of the gas mixture. A conclusion is drawn regarding the common nature of the process of ignition of a combustible gas mixture by a laser spark excited in the reactor volume and the previously investigated initiation of combustion by laser sparks excited at solid targets, high-power microwave discharges, and high-current gliding discharges.
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Original Russian Text © S.Yu. Kazantsev, I.G. Kononov, I.A. Kossyi, N.M. Tarasova, K.N. Firsov, 2009, published in Fizika Plazmy, 2009, Vol. 35, No. 3, pp. 281–288.
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Kazantsev, S.Y., Kononov, I.G., Kossyi, I.A. et al. Ignition of a combustible gas mixture by a laser spark excited in the reactor volume. Plasma Phys. Rep. 35, 251–257 (2009). https://doi.org/10.1134/S1063780X09030088
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DOI: https://doi.org/10.1134/S1063780X09030088