Research on the bunching performance of an improved plasma torch of strong current arc explosion shock waves

DOI:	10.11809/bqzbgcxb2023.06.004
Keywords:	arc; explosion; explosion shock wave; bunching; improved plasma torch; equivalent arc explosion
Abstract:	Strong current arc explosive shock waves with high temperature and high pressure have excellent application prospects in the field of material processing and military industry. In order to achieve directional thermal shock, it is necessary to bunch the arc explosion shock wave. This paper designs a prototype of a bunching machine by improving the plasma torch. By using Autodyn 2D and Euler 2D, a high precision multi substance solver, nine design schemes are numerically simulated through the equivalent arc explosion method to analyze the influence of the bunching tube, tube elevation angle, electrode distance and other factors on the bunching performance of the arc explosion shock wave. The results show that, after adding the bunching tube, the improved plasma torch can increase the velocity and pressure peak of the arc explosion shock wave jet by 300% and 500% respectively. The tube elevation angle γ significantly influences the outlet jet velocity. When the arc inclination angle λ is 45 °, the velocity and energy of the bunching wave are the largest. The electrode distance mainly affects the change rates of velocity and pressure of the arc explosion shock wave.
Published:	2023-06-28
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