Influence of wall-jet gas injection on liquid-metal MHD generator performance

✍ Scribed by G. Fabris; E.S. Pierson; R.L. Cole

• Publisher: Elsevier Science
• Year: 1979
• Weight: 998 KB
• Volume: 19
• Category: Article
• ISSN: 0013-7480
• DOI: 10.1016/0013-7480(79)90020-2

✦ Synopsis

Earlier experiments on use of gas wall-jets as a means of reducing shunt current losses and liquid metal boundary layers are critically reevaluated. A number of new liquid-metal MHD tLMMHDI generator experiments, with and without gas wall injection, were performed and analyzed. Experimental visualization of air wall injection in water revealed jet behavior under different pressure gradients. A gas wall-jet can separate liquid from the walls only under positive pressure gradient conditions. The basic physical cause of the inability to prevent wetting of walls under a negative pressure gradient is absence of a force that would repulse liquid from walls, such as exist, for example, in film boiling or in electromagnetic confinement.

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