Sustained diffusive alternating current gliding arc discharge in atmospheric pressure air

Jiajian Zhu, Jinlong Gao, Zhongshan Li, Andreas Ehn, Marcus Aldén, Anders Larsson, Yukihiro Kusano

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Abstract

Rapid transition from glow discharge to thermal arc has been a common problem in generating stable high-power non-thermal plasmas especially at ambient conditions. A sustained diffusive gliding arc discharge was generated in a large volume in atmospheric pressure air, driven by an alternating current (AC) power source. The plasma column extended beyond the water-cooled stainless steel electrodes and was stabilized by matching the flow speed of the turbulent air jet with the rated output power. Comprehensive investigations were performed using high-speed movies measured over the plasma column, synchronized with simultaneously recorded current and voltage waveforms. Dynamic details of the novel non-equilibrium discharge are revealed, which is characterized by a sinusoidal current waveform with amplitude stabilized at around 200 mA intermediate between thermal arc and glow discharge, shedding light to the governing mechanism of the sustained spark-suppressed AC gliding arc discharge.
Original languageEnglish
Pages234102-234102
Volume105
No.23
Specialist publicationApplied Physics Letters
PublisherAmerican Institute of Physics (AIP)
DOIs
Publication statusPublished - 2014

Subject classification (UKÄ)

  • Atom and Molecular Physics and Optics

Keywords

  • Gliding arc
  • Non-thermal plasma
  • turbulence

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