Experimental Study on Propagation form of High Speed Plasma Jet in Liquid Media

摘要

The interaction mechanism of plasma jet with liquid media is one of the most important problems in the study of interior ballistic of electrothermal chemical propulsion.The propagation form and the interaction mechanism of plasma jet in water arc studied experimentally in this paper. The plasma jet is generated by the discharging of pulse power in a polyethylene capillary. The construction and consecutive expansion process of plasma jet in water are recorded by high speed digital camera system. The effects of discharge voltage, nozzle diameter and boundary shape on the propagation form are studied. The expansion velocity of plasma jet in water is gotten. The results indicate that the expansion construction of plasma jet in water is a typical Taylor cavity, the entrainment phenomena of plasma jet to water is visualized in pictures,and there are strong interaction in the surface of Taylor cavity.