Aravin GS

Babushenko DI

Basevich VYa

Bellenoue M

Berezhetskaya NK

Bityurin VA

Calcote HF

Golant VE

Ihta Y

Kozlov GI

Semenov NN

Shtern VIA

Sokolik AS


            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’ under laser spark ignition and a wave with a brightly glowing plasmoid behind under ignition from high-current 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
            n
            e
            ≈10
            12
             cm
            −3
            ) and a high frequency of electron–neutral collisions (
            ν
            en
            ≈10
            12
             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.
          </jats:p

K. V. Artem'ev

N. K. Berezhetskaya

S. Yu. Kazantsev

N. G. Kononov

I. A. Kossyi

N. A. Popov

N. M. Tarasova

E. A. Filimonova

K. N. Firsov

Crossref

Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences

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

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

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