Ionization relaxation region in a nonequilibrium disk MHD generator

Journal Article · Wed Jun 01 00:00:00 EDT 1988 · J. Propul. Pow.; (United States)

DOI:https://doi.org/10.2514/3.23060· OSTI ID:6847983

Harada, N; Yamasaki, H; Shioda, S

The ionization relaxation region in an Ar/K-driven disk MHD generator and its effects have been experimentally investigated. Experimental results have shown that a decrease in the stagnation temperature of a working gas increases the area covered by the negative Hall field near the anode, which is strongly affected by ionization relaxation, and results in reducing output power. It is also observed that the power output increases with an increase in seed fraction. The unfavorable effects of ionization relaxation can be reduced by increasing applied magnetic field strength. Comparison between the results of one-dimensional calculations and experimental results has also been performed. Calculations can predict the Hall potential distribution along the flow direction when we assume an adequate electron temperature at the MHD channel inlet and fluctuations of a plasma at the inlet of the channel are assumed to be insignificant. 13 references.

• Research Organization: Tokyo Institute of Technology, Yokohama (Japan)
• OSTI ID: 6847983
• Journal Information: J. Propul. Pow.; (United States), Vol. 4
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
DISK MHD GENERATORS
PERFORMANCE
ARGON
COMPARATIVE EVALUATIONS
ELECTRIC CONDUCTIVITY
ELECTRON TEMPERATURE
HALL EFFECT
IONIZATION
MAGNETIC FIELDS
SHOCK TUBES
STAGNATION
WORKING FLUIDS
DIRECT ENERGY CONVERTERS
ELECTRICAL PROPERTIES
ELEMENTS
FLUIDS
GASES
MHD GENERATORS
NONMETALS
PHYSICAL PROPERTIES
RARE GASES
300102* - MHD Generators- Performance & Testing