Staircase Electrode-Wall Configuration for MHD (Magnetohydrodynamic) Generators.
Patent, Filed 8 Nov 79, patented 9 Feb 82,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A staircase electrode-wall configuration for a MHD generator which uses fluid dynamic means to protect the electrodes form substantial damage due to arcing and chemical attack. The electrode walls of a MHD generator duct have periodic conductorinsulator elements where channel divergence or convergence is accomplished in a stepwise fashion. The electrode is situated within the insulator of each element to be back-ward-facing so as not to be directly exposed to the hot gas flow. The turbulence which exists at the backward-facing electrode moves the arc spot about the surface to prevent severe local damage. Chemical attack is inhibited by a laminated electrode surface of a low corrosive material and the turbulence which aids in cooling the electrode face. Additional cooling may be obtained by a purge jet at the electrode face.
- Electrical and Electronic Equipment
- Plasma Physics and Magnetohydrodynamics