Study on the Influence of Liner Structure on Jet Forming Driven by Electromagnetic Loading

A shaped charge liner driven by a strong electromagnetic field instead of explosives is a new way to form a jet. In this article, a new liner structure is performed, and a CQ-4 device of the Institute of Fluid Physics, Chinese Academy of Engineering Physics is used to load the liner. The jet forming and penetration power of conical liners under strong electromagnetic loading are tested and theoretically analyzed. Experimental results are in good agreement with the theoretical calculation. The results show that the 1- and 1.5-mm-thick liners have formed jets, but the liner with 2-mm wall thickness has failed to form an effective jet. And coming to the conclusion that under the loading conditions studied in this research, the jet velocity and penetration power decrease with the increase in the liner thickness. The liner structure is compared with Grace's in his experiments and was found that it can improve the electromagnetic energy utilization rate, the peak current increasing by 9.6% and the jet tip velocity increasing by 8%. The influence of the cone angle of the liner on jet forming is also verified by a theoretical calculation taking into account the jet tip velocity, jet length, and the penetration power that increase with the decrease in cone angle.