Electrical effects of coal slag in a diffuse mode MHD generator
Conference
·
· AIAA Pap.; (United States)
OSTI ID:5188946
Ten high-temperature (1700-2000 K) platinum-rhodium capped magnesia electrodes were successfully tested in a slagging MHD generator with diffuse mode (non-arcing) current transport at 3 amps/cm/sup 2/ occurring for electrode temperatures over 1800 K. A diffuse mode, two-dimensional model for current density and potential distributions was developed which includes the effects of slag layer hydrodynamics, slag layer energy transport, and assumed plasma boundary layers. Numerical and experimental results are compared and the effects of slag, current density, generator size, wall temperature, and cathode shorting on generator performance are numerically determined. 8 refs.
- Research Organization:
- Iowa State Univ, Ames, USA
- OSTI ID:
- 5188946
- Report Number(s):
- CONF-810106-
- Conference Information:
- Journal Name: AIAA Pap.; (United States)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
30 DIRECT ENERGY CONVERSION
300102 -- MHD Generators-- Performance & Testing
300104* -- MHD Generators-- Duct Engineering & Fluid Dynamics
CURRENT DENSITY
DIRECT ENERGY CONVERTERS
DISTRIBUTION
ELECTRIC POTENTIAL
ELECTRODES
FLUID MECHANICS
HYDRODYNAMICS
MECHANICS
MHD CHANNELS
MHD GENERATORS
PERFORMANCE
SLAGS
SPATIAL DISTRIBUTION
TEMPERATURE EFFECTS
TWO-DIMENSIONAL CALCULATIONS
300102 -- MHD Generators-- Performance & Testing
300104* -- MHD Generators-- Duct Engineering & Fluid Dynamics
CURRENT DENSITY
DIRECT ENERGY CONVERTERS
DISTRIBUTION
ELECTRIC POTENTIAL
ELECTRODES
FLUID MECHANICS
HYDRODYNAMICS
MECHANICS
MHD CHANNELS
MHD GENERATORS
PERFORMANCE
SLAGS
SPATIAL DISTRIBUTION
TEMPERATURE EFFECTS
TWO-DIMENSIONAL CALCULATIONS