Thermal-chemical instability of weakly ionized plasma in a reactive flow

Hongtao Zhong, Mikhail N. Shneider, Mikhail S. Mokrov, Yiguang Ju

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

The control of plasma instability of weakly ionized plasma in a reactive flow is of great importance in plasma-assisted combustion, catalysis, fuel reforming and material synthesis. In this work, we propose a new concept of plasma chemical instability and analyze the mechanisms and impact of plasma chemical instability on the transition from a uniform discharge to a contracted state of a self-sustained glow discharge in a reactive H2-O2-N2 mixture. A one-dimensional numerical model for plasma chemical instability was developed which accounted for convective heat loss, Joule heating of plasma, and major non-equilibrium plasma-assisted combustion kinetic pathways including electron-impact ionization, vibrational energy transfer, electron attachment, combustion reactions, and heat release. The results showed that plasma chemical instability significantly modified the onset plasma current of plasma thermal instability. Specifically, the critical condition of the instability transition was strongly influenced by electron-impact reactant ionization, electron attachment to oxygen, endothermic/exothermic chemical reactions, and the formation of reaction products.

Original languageEnglish (US)
Article number484001
JournalJournal of Physics D: Applied Physics
Volume52
Issue number48
DOIs
StatePublished - Sep 11 2019

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Keywords

  • hydrogen combustion
  • plasma chemical instability
  • plasma thermal instability
  • reactive flow
  • weakly ionized plasma

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