![]() Experimental and theoretical results on disk-geometry MHD generators are reported. These include arcing and interelectrode breakdown phenomena, the effect of plasma nonuniformities on generator performance, and the effect of viscous wakes in the MHD environment. Theoretical studies on time dependent MHD generator behavior, and some confirmatory experimental work are reported. Most of the materials studies have been directed towards the solution of the electrode/insulator problems in the channel. Studies of the rate and more ยป extent of thermal decomposition of coals have been made. A computer model of the total MHD generating system has been developed and used to explore the effect of component operating conditions on plant performance and cost. During the last year a small simulation facility was constructed to test these principles and develop diagnostic techniques. Research during the past 3 years on coal-fired MHD has included: critical engineering experiments and studies: (a) modeling of the total MHD system (b) materials development (c) coal studies (devolatilization and ash behavior) (d) MHD plasma effects (e) development of the disk generator and (f) design and evaluation of magnets. ![]() ![]() This paper summarizes research conducted under a DOE MHD SBIR entitled: more higher than for PGF combustion products. ![]()
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January 2023
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