Fast combustion waves and chemi-ionization processes in a flame initiated by powerful local plasma source in a closed reactorстатья

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Дата последнего поиска статьи во внешних источниках: 27 февраля 2017 г.

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[1] Fast combustion waves and chemi-ionization processes in a flame initiated by powerful local plasma source in a closed reactor / K. B. Artem’ev, N. K. Berezhetskaya, S. Y. Kazantsev et al. // Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. — 2015. — Vol. 373. — P. 20140334. Results are presented from experimental studies of the initiation of combustion in a stoichiometric methane–oxygen mixture by a freely localized laser spark and by a high-current multispark discharge in a closed chamber. It is shown that, preceding the stage of ‘explosive’ inflammation of a gas mixture, there appear two luminous objects moving away from the initiator along an axis: a relatively fast and uniform wave of ‘incomplete combustion’ underlaser spark ignition and a wave with a brightly glowing plasmoid behind under ignition from highcurrent slipping surface discharge. The gas mixtures in both the ‘preflame’ and developed-flame states are characterized by a high degree of ionization as the result of chemical ionization (plasma density ne ≈1012 cm−3) and a high frequency of electronneutral collisions (νen ≈1012 s−1). The role of chemical ionization in constructing an adequate theory for the ignition of a gas mixture is discussed. The feasibility of the microwave heating of both the preflame and developed-flame plasma, supplementary to a chemical energy source, is also discussed. [ DOI ]

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