Mixing and magnetic effects on a nonequilibrium argon plasma jet

Takehiko Sato, Masaya Shigeta, Daigo Kato, Hideya Nishiyama

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Effects of gas admixture and of an applied magnetic field on a nonequilibrium Ar plasma jet are investigated experimentally. The maximum gas temperature and gas velocity are observed in the core region of an Ar/He plasma due to the small density, the large thermal conductivity and Mach number effect of He. Furthermore, their radial gradients become very steep in the applied magnetic field. In contrast, the gas temperature and gas velocity of an Ar/N2 plasma jet are not so high and their radial gradients are moderate, because of the energy loss needed to dissociate N2 gas in the core region and of the active thermal diffusion in the radial direction. Electron number density is larger in the case of an Ar/Ar plasma jet or an Ar/He plasma jet compared with that of an Ar/N2 plasma, since N2 gas dissociates before ionization. It is shown that the admixing of He or N2 gas influences controllably the flow and temperature fields of a nonequilibrium Ar plasma jet also in an applied magnetic field.

Original languageEnglish
Pages (from-to)273-278
Number of pages6
JournalInternational Journal of Thermal Sciences
Volume40
Issue number3
DOIs
Publication statusPublished - 2001 Mar

Keywords

  • Admixing
  • Magnetic field
  • Plasma jet
  • Plasma properties
  • Thermofluid characteristics
  • thermal nonequilibrium

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)

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