Numerical simulation on structure modules of effective jet

The typical copper liner with a small cone angle was divided into four sections along the bus direction via the explicit finite software LS-DYNA, and the tracer point method was used to study the movement of the liner element and the structure modules of the effective metallic jet. The result indicates that the liner material may be divided into six sections by velocity interval after the jet formation and stabilization. The highest-velocity section is made of the top material inside the liner, and the mid-higher velocity section and the mid-velocity section made of the middle and lower half material inside the liner, respectively. In the height range of about 0.25 times as high as the liner height away from the liner bottom, the liner material can not become effective jets. And the initial material elements of the liner are distributed as tubular in the effective jet.