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Description
The efficiency of the electromagnetic launch system depends on the electromagnetic energy which is converted into the kinetic energy of the projectile. The energy loss of electromagnetic rail launch system mainly includes electromagnetic loss, friction loss and aerodynamic loss. The aerodynamic loss may reach up to 10% of the system energy, and the higher the projectile velocity, the higher the proportion of total energy consumption. At the same time, this will lead to a rapid rise in total energy consumption. Under normal circumstances, the aerodynamic drag is proportional to the square of velocity. However, there is a gap between the armature and the two sides of the insulating plate, which makes the flow field in the launching process more complicated. In order to understand the influence of the flow field on the aerodynamic drag of projectile and the performance of the electromagnetic rail launcher, in this paper, the aerodynamic characteristics of the interior ballistics of the electromagnetic launcher are analyzed by theoretical analysis and numerical simulation.
