Ring-shaped discharge structures in a closed cycle MHD disk generator

Journal Article · Mon Jun 01 04:00:00 EDT 1987 · J. Propul. Pow.; (United States)

DOI:https://doi.org/10.2514/3.22981· OSTI ID:6297110

Fukuda, H; Kabashima, S

Numerical simulations are carried out to study plasma properties in a nonequilibrium disk-type MHD generator. The analysis is based on a two-dimensional time-dependent MHD equation, and is performed in the r-z plane. From the r-z analysis, the current distributions in the boundary layer, electrode regions are obtained, as well as the channel main flow region. The two-state nature of plasma, i.e., the formation of streamers and their dynamical behavior in the channel is confirmed. The dependence of the streamer properties on the magnetic field strength and load resistance is examined. The calculations suggest the existence of an eddy current in the boundary layer for the high-loading parameter. Some enhanced eddy currents in the nozzle region and the intensive eddy current at the upper-stream edge of the cathode are obtained for some plasma parameters. 19 references.

• Research Organization: Hitachi, Ltd., Kokubunji, Japan; Tokyo Institute of Technology, Yokohama, Japan
• OSTI ID: 6297110
• Journal Information: J. Propul. Pow.; (United States), Journal Name: J. Propul. Pow.; (United States) Vol. 3; ISSN JPPOE
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300104* -- MHD Generators-- Duct Engineering & Fluid Dynamics
BOUNDARY LAYERS
CLOSED-CYCLE MHD GENERATORS
CURRENTS
DIRECT ENERGY CONVERTERS
EDDY CURRENTS
ELECTRIC CURRENTS
ENERGY LOSSES
FLUID MECHANICS
HYDRODYNAMICS
LAYERS
LOSSES
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
MECHANICS
MHD GENERATORS
PLASMA