Studies on Explosion Distortion and First Breakdown under Explosive Detonation

The distortion process of the charge envelope and first breakdown is studied in order to understand the formation process of explosion breakdown. The distortion process driven by explosive detonation is observed by means of schlieren technique. A large distortion medium－water is chosen as the sample for observation. The experimental observations show that the expansion of water in cylinder starts from the end of initiation for initiator, then forms a slant and wave interface. The results indicate that the breakdown of the wave interface starts with an outside. It is an important reason that the instability of interface may make it to destabilize and to break. It is observed experimentally that the matter dimension becomes smaller and smaller at different delay time after the explosive detonated. The influences of explosive detonation light on figure and of explosion vibration on light path were overcomed. A simple trigger was developed, and the problem of synchronization of outside light source with explosive initiation was resolved.