ELECTRICAL AND AERODYNAMIC BEHAVIOR OF ARCS UNDER SHOCK CONDITIONS

Arc-shock interaction in a supersonic nozzle has been investigated for a current range from 200 to 1500 A and for three pressure ratios, The adverse pressure gradient associated with the shock causes how separa tion and a broadening of are cross section, Compared with the shock po sition in the absence of the are, the shock center is moved toward ups tream and to a region close to the wall, The shock is no longer plane, The center of the shock is not very sensitive to the current, but the shock strength reduces when the current is increased, V-I characteris tics under shock conditions are slightly modified.