High magnetic field MHD generator program. Annual report, October 1, 1979-September 30, 1980
Progress in a theoretical and experimental program designed to investigate MHD channel phenomena which are important at high magnetic fields is described. The areas of research include nonuniformity effects, boundary layers, Hall field breakdown, the effects on electrode configuration and current concentrations, and studies of steady-state combustion disk and linear channels in an existing 6 Tesla magnet of small dimensions. In the study of the effects of nonuniformities and instabilities, theoretical models have been developed and tested against available data. Experimental facilities, including new diagnostics, have been prepared for forthcoming experiments. Boundary layer measurements and calculations of velocity, temperature, and electron density have been systematically assessed; by accounting for the effect of free-stream turbulence, good agreement is obtained between measurement and theory. An improved laser doppler anemometer has been developed for turbulence damping and velocity profile measurements. Experiments with several insulator designs have shown that conductively cooled insulators can substantially inhibit insulator-induced Hall field breakdown. An improved theoretical model has yielded good agreement with the results of breakdown experiments. Three-dimensional calculations of the effects of electrode configuration on current concentrations have been performed. Reduced current concentrations were found for electrodes with surfaces to the magnetic field. Experiments were conducted at magnetic fields over 5 Tesla for both disk and linear MHD channels.
- Research Organization:
- Stanford Univ., CA (USA). High Temperature Gasdynamics Lab.
- DOE Contract Number:
- AC01-80ET15611
- OSTI ID:
- 6609423
- Report Number(s):
- DOE/ET/15611-3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
300102 -- MHD Generators-- Performance & Testing
300104* -- MHD Generators-- Duct Engineering & Fluid Dynamics
ASHES
BOUNDARY LAYERS
BREAKDOWN
CHEMICAL COMPOSITION
COAL FINES
COAL-FIRED MHD GENERATORS
COMPUTER CALCULATIONS
CURRENT DENSITY
CURRENTS
DAMPING
DATA
DIRECT ENERGY CONVERTERS
DISK MHD GENERATORS
DISTURBANCES
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATORS
ELECTRICAL PROPERTIES
ELECTRODES
ELECTROMAGNETS
ELECTRON DENSITY
ELECTRON TEMPERATURE
EQUIPMENT
EXPERIMENTAL DATA
FLOW RATE
FUNCTIONS
GAIN
GRAPHS
HALL EFFECT
HYDROMAGNETIC WAVES
INFORMATION
INSTABILITY
LAYERS
MAGNETIC FIELDS
MAGNETOACOUSTIC WAVES
MAGNETS
MATHEMATICAL MODELS
MHD CHANNELS
MHD GENERATORS
NUMERICAL DATA
PARTICLE SIZE
PERFORMANCE TESTING
PHYSICAL PROPERTIES
PLASMA DIAGNOSTICS
PLASMA INSTABILITY
RESIDUES
SIZE
SPECTRAL DENSITY
SPECTRAL FUNCTIONS
STEADY-STATE CONDITIONS
TABLES
TESTING
THEORETICAL DATA
TURBULENCE
VELOCITY
VOLTAGE DROP