含气隙的铝丝电爆炸特性

In the industrial production of nanoparticles by the metal wire electric explosion method, different voltages will have different air gap breakdown lengths in the case of continuous wire feeding. Consequently, in order to study the influences of voltage and air gap length on the electrical explosion characteristics of aluminum wire, a wire feeder was used to transport metal wires with a diameter of 0.4 mm to the high-voltage electrode plates under the condition of 1 atmosphere of air. A high-speed camera was used to perform an optical diagnosis in the wire feeding process, and the air gap breakdown length under different voltages was obtained. Then, the specific action model and Rompe-Weizel's spark resistance model were used to simulate the experiment. The above research shows that there is a proportional relationship between the breakdown length of the air gap and the charging voltage, and the ratio is about 20 kV/cm. Under continuous wire feeding conditions, the air gap breakdown length will decrease as the number of explosions increases. The air gap has a negligible effect on the electric explosion. Increasing the charging voltage can effectively increase the energy deposition rate and accelerate the phase change process.