Study of the Dynamic Processes of Multi-point Initiation of Co-axial Explosively Formed Projectiles with Tail Wings Using High Speed Image Processing Technologies

In order to study the dynamic processes of co-axial explosively formed projectiles (CEFP) with tail wings formed by multi-point initiation, a novel image processing technique based on a high-speed camera was designed. The temperature field distribution and formation process of a CEFP with tail wings, formed by multipoint initiation, can be measured using the colorimetric temperature measurement method, the binary image processing technique, and contour detection technologies. The experimental results were verified using LS-DYNA software. The experimental results showed that a projectile with a regular shape and four symmetrical tail wings was formed by initiating the shaped charge with a double-layer liner at four points. The explosion temperature of the detonation products was in the range of 2000-2600 K, and the explosion pressure at the detonation center was 6.92 GPa. The morphology, flight velocity, and draw ratio of the CEFP obtained using the high-speed image processing technology were in good agreement with numerical simulation results, which demonstrates a promising application prospect for measuring the explosion temperature, flight velocity, and motion attitude of shells, rockets, and other kinds of weapons.