Abstract
A high current density discharge can be, under proper conditions, established between the top and the bottom of a supersonic flow channel with a rectangular cross section. In proximity of the negatively biased electrode, the cathode, large potential gradients arise, and a considerable amount of heat is dissipated in the boundary-layer flow. A compression fan has been observed emanating from the leading edge of the cathode. A numerical and experimental investigation of this phenomenon is the subject of this paper. The density distribution in the boundary layer over the cathode, in the presence of the electrical discharge, has been measured and compared with the theoretical predictions. Also, the strength of the perturbation emanating from the cathode leading edge has been measured and calculated.
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