摘要：直线感应发射器次级的轴向长度直接影响次级与初级的电磁耦合效果，从而影响直线感应发射器的运行特性。根据直线感应发射器的集中参数等效电路模型和现有实验模型，结合实验与仿真分析，讨论了次级轴向长度对出膛速度、能量转换效率、加速平稳性等主要特性的影响。研究结果表明次级出膛速度随次级轴向长度的增加而降低；次级动能转换效率随次级轴向长度的增加而增加；次级的轴向长度接近于整数倍极距时，加速过程相对平稳。
关键词：直线感应发射器；次级轴向长度；出膛速度；动能转换效率；加速平稳性；电磁发射

Abstract: The secondary axial length has a direct effect on the electromagnetic coupling between the primary and secondary of the linear induction launcher. Consequently it impresses the performance of the launcher. Based on the lumped parameter transient model and the available experimental model, the main characteristics of the linear induction launcher, such as muzzle velocity, energy transfer ratio, and accelerating stability were analyzed through experiments and simulations. The muzzle velocity decreases with increasing secondary axial length. The kinetic energy transfer ratio increases with increasing secondary axial length. The acceleration fluctuates narrower while the secondary length is integral times the pole pitch.
Key words: linear induction launcher; secondary axial length; muzzle velocity; kinetic energy transfer ration; accelerating stability; electromagnetic launch