Study on Modeling of Electromagnetic-Thermal Multi-field Coupling of Rail Electromagnetic Launcher and Its Electromagnetic Field and Temperature Field Distribution

Electromagnetic launch technology is a kind of launch technology that uses electromagnetic force to propel an object to high speed or ultra-high speed, which has incomparable advantages over traditional launch methods in terms of launch speed, launch efficiency, controllability, concealment and cost. In order to solve the problem of low service life and low reuse rate caused by ablation damage of copper alloy slide rail in the practical process of rail electromagnetic launcher, an equivalent scaling model under electromagnetic thermal multi-field coupling is established in this paper, and the overall distribution of electromagnetic field and temperature field are simulated. It is concluded that the current density and magnetic induction intensity are concentrated in the armature groove and tail and around the contact point between the armature and the slide rail, and the heat is concentrated in the armature groove and the slide rail. These areas are where the electromagnetic launcher is prone to ablation damage. It provides the guidance for the manufacture and test of electromagnetic launcher.