Three-dimensional structures of MHD flow in a disk generator

Hiromichi Kobayashi, Yoshihiro Okuno, Shigeharu Kabashima

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Three-dimensional nonuniforrn plasmas and boundary layers have been studied numerically under an MHD interaction. The nonuniform plasma of "streamer" owing to weak ionization of seed material has a spiral structure in r-6 plane, and the plasma becomes almost uniform between the walls in T-Z plane. This structure is almost the same as that in our previous paper, where the gas (heavy particle) properties are assumed to be invariant and steady. In addition to the streamer, the nonuniform plasma of "domain" owing to weak ionization of noble gas is revealed. The domain has the structure perpendicular to the streamer. In a strong MHD interaction case, the static pressure considerably increases in the upstream region of a generation channel, and the pseudo-shock waves appear in the generator, but the plasma is almost uniform along 6 direction. The boundary layer in the strong MHD interaction is considerably thick, and in the broad region near the wall the Hall current flows reversely. In the weak MHD interaction case, the plasma forms a nonuniform structure along the 6 direction, and the Hall current does not always flow in the opposite direction even on the insulator wall since the azimuthal electric field is not zero.

Original languageEnglish
Pages (from-to)1526-1531
Number of pages6
JournalIEEE Transactions on Plasma Science
Volume26
Issue number5
DOIs
Publication statusPublished - 1998 Dec 1
Externally publishedYes

Keywords

  • Boundary layer
  • Mhd generation
  • Mhd interaction
  • Nonequilibrium plasma
  • Three-dimensional simulation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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