Research of the axial strong magnetic field applied at the initial period of inertial stretching stage of the shaped charge jet

Abstract

The stability of shaped charge jets (SCJs) is an important factor affecting their penetration ability, and it will be worse in case of the large standoff under the natural condition. The external magnetic field can improve the stability of SCJs, and increase their depth of penetration (DOP). This paper evaluates the effect of an axial magnetic field on a SCJ through DOP experiment and X-ray experiment, and the field is loaded at initial period of the inertial stretching stage during experiments. A standoff of 650 mm (11.61CD) is employed in the experiments. The initial energy is provided by capacitors, and the initial voltages at both ends of them are 20.18 kV in the experiments. The experimental results show that the external magnetic field loaded at initial period of the inertial stretching stage of the SCJ can increase its stability, the penetration capability is increased by 72.8%. The radiograph indicates that the stability of the SCJ influenced by the strong magnetic field is better than the natural conditions. The DOP experimental results are consistent with the X-ray experimental results.