Effect of notch dimensions in the backside of armature on railgun performance

Idea of notching the armature trailing, in order to improve the railgun performance is minded by researchers from erstwhile. These improvements are observed by some experimentation. In this paper, railgun is simulated by a FEM code. Then the effects of slit dimensions on current density, field and armature accelerating force are investigated. Finally, normalized accelerating force is plotted versus slit depth and width. Then optimize slit depth and width arc obtained. Using the optimum dimensions, we can increase accelerating force and system efficiency. The variation of maximum current density versus slit depth and width, the armature accelerating force versus slit dimensions are presented in this paper.