MHD (magnetohydrodynamic) channel development: Quarterly report, July 1987-September 1987

Technical Report · Thu Oct 01 04:00:00 EDT 1987

OSTI ID:7050200

A series of generator experiments was carried out to investigate the functional dependencies of the cathode wall slag layer resegmentation frequency upon fluid and generator characteristics. Variations in gas conductivity, magnetic field intensity, Hall parameter, current density, and electric field intensity were investigated to establish which generator parameter(s) affect the cathode slag shorting patterns. The validity of three proposed models for slag layer resegmentations are tested by comparisons with measured data. The generator test results, showing that the cathode nonuniformity patterns are only a function of the Hall voltage, suggest that the high voltage inter-cathode gaps might be created by axial leakage currents and maintained by arcs. The voltages across the ''open'' gaps are characteristic inter-electrode arc voltage. The structure and form of sulfur in US coals are reviewed. The effects which the different forms of sulfur in the coal have on the release of sulfur in the MHD combustion environ are described. A survey on the status of corrosion research in MHD and other coal conversion processes is made. Similarities and differences in these conversion processes are noted. Most coal-using systems have encountered corrosion problems related to the sulfur content of the coal. The presence of electrochemical and thermal effects on the MHD generator walls resulted in MHD-specific corrosion problems.

• Research Organization: Avco-Everett Research Lab., Everett, MA (USA)
• DOE Contract Number: AC22-84PC70507
• OSTI ID: 7050200
• Report Number(s): DOE/PC/70507-14; ON: DE88014787
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300101* -- MHD Generators-- Design & Development
300102 -- MHD Generators-- Performance & Testing
CARBONACEOUS MATERIALS
COAL
COAL-FIRED MHD GENERATORS
DATA
DESIGN
DIRECT ENERGY CONVERTERS
DOCUMENT TYPES
ELECTRONIC CIRCUITS
ENERGY SOURCES
FOSSIL FUELS
FUEL OILS
FUELS
HALL EFFECT
INFORMATION
LIQUID FUELS
MATERIALS
MHD CHANNELS
MHD GENERATOR AERL MARK VII
MHD GENERATOR CDIF
MHD GENERATORS
NUMERICAL DATA
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PERFORMANCE TESTING
PETROLEUM PRODUCTS
POWER CONDITIONING CIRCUITS
PROGRESS REPORT
SLAGS
TESTING