Three-dimensional structures of MHD flow in a disk generator

Journal Article · Thu Oct 01 04:00:00 EDT 1998 · IEEE Transactions on Plasma Science

DOI:https://doi.org/10.1109/27.736055· OSTI ID:321009

Kobayashi, Hiromichi; Okuno, Yoshihiro; Kabashima, Shigeharu ^[1]

---

1. Tokyo Inst. of Tech., Yokohama (Japan). Dept. of Energy Sciences

Three-dimensional nonuniform 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-{theta} plane, and the plasma becomes almost uniform between the walls in r-z plane. This structure is almost the same as that in their 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 {theta} 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 {theta} 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.

• OSTI ID: 321009
• Journal Information: IEEE Transactions on Plasma Science, Journal Name: IEEE Transactions on Plasma Science Journal Issue: 5 Vol. 26; ISSN ITPSBD; ISSN 0093-3813
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
BOUNDARY LAYERS
DISK MHD GENERATORS
MAGNETOHYDRODYNAMICS
NON-EQUILIBRIUM PLASMA
NUMERICAL ANALYSIS
PLASMA SIMULATION
THREE-DIMENSIONAL CALCULATIONS