Multiphysics Coupling Study of a Novel Pulsed Strong Magnetic Coil

A pulsed strong magnetic coil can generate a pulsed strong magnetic field, which can be used in the electromagnetic launch, electromagnetic forming, pulsed power supply, and other fields. During the continuous discharge process, the coil temperature will continue to increase due to Joule heating. Effective thermal management is a necessary condition for the stable and reliable operation of the coil during continuous discharge. In this article, a method for heat dissipation of coils based on the principle of energy storage and heat absorption of phase change materials (PCMs) is proposed. A 2-D transient coupled heat-transfer model of the pulsed strong magnetic coil in phase change energy storage heat absorption mode is established in finite-element software. First, the accuracy of the simulation software is verified, and the correlation between the mesh and the time step is analyzed. Then, the temperature difference of the coil under the conditions of phase change heat absorption and natural heat dissipation at different discharge intervals was studied. Finally, the effects of latent heat, melting temperature, and thermal conductivity on the heat dissipation of the coil were analyzed. At the same time, to verify the mechanical properties of the side flange heat dissipation structure, we simulated and analyzed the structural field.