Numerical Simulation of Melt-wave in Electromagnetic Launcher
DOI:
https://doi.org/10.13052/2024.ACES.J.400807Keywords:
Electromagnetic launcher, erosion depth, melt-wave, transition, velocity skinning effectAbstract
To accurately characterize the erosion phenomenon of the armature in electromagnetic railgun launches, a two-dimensional magneto-thermal-mechanical coupling model for melt-wave was developed. For the first time, a fully implicit finite volume method was employed for equation discretization, and an alternating direction implicit method was used for coupling calculations to obtain both steady-state and transient erosion characteristics of the armature. The results demonstrate that the velocity skin effect concentrates significant current at the armature tail, driving the propagation of the melt-wave. The erosion rate remains constant initially but increases significantly when variations in electrical conductivity are considered. After applying an external current, the erosion distance increases sharply with current amplitude before leveling off, and changes in the duration of current amplitude also significantly influence the erosion distance. This study provides a clear understanding of the armature’s erosion behavior, offering a solid theoretical foundation for further research on armature transition phenomenon.
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