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Fast combustion waves and chemi-ionization processes in a flame initiated by a powerful local plasma source in a closed reactor.
Artem'ev, K V; Berezhetskaya, N K; Kazantsev, S Yu; Kononov, N G; Kossyi, I A; Popov, N A; Tarasova, N M; Filimonova, E A; Firsov, K N.
Afiliação
  • Artem'ev KV; A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilov Street 38, Moscow 119991, Russia.
  • Berezhetskaya NK; A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilov Street 38, Moscow 119991, Russia.
  • Kazantsev SY; A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilov Street 38, Moscow 119991, Russia.
  • Kononov NG; A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilov Street 38, Moscow 119991, Russia.
  • Kossyi IA; A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilov Street 38, Moscow 119991, Russia kossyi@fpl.gpi.ru.
  • Popov NA; D. V. Skobeltsyn Institute of Nuclear Physics, Moscow State University, Leninskie Gory, 2, Moscow 119991, Russia.
  • Tarasova NM; A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilov Street 38, Moscow 119991, Russia.
  • Filimonova EA; Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya Street 13, Building 2, Moscow 125412, Russia.
  • Firsov KN; A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilov Street 38, Moscow 119991, Russia.
Philos Trans A Math Phys Eng Sci ; 373(2048)2015 Aug 13.
Article em En | MEDLINE | ID: mdl-26170426
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.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2015 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2015 Tipo de documento: Article