摘要
考虑了脉冲波形的影响,采用简化模型计算了自行设计的一种小型电磁轨道炮在单次发射后金属导轨和电枢中的焦耳热.结果表明铜导轨的热损耗是81.5 kJ,大约占输入总能量的20%,该热量可以使铜导轨表面的温度升高至260℃,远低于铜的熔点1 083℃.铝合金电枢中的焦耳热是991 J,该热量可以使电枢表面的温度升至270℃,表明电枢在发射过程中温度不会达到熔点(620℃).电磁轨道炮单次发射时其导轨和电枢的温升不会造成导轨和电枢的熔化.
Considering the effect of current profile, a simple model was adopted to calculate the rail and armature joule heating of a small-scale electromagnetic rail gun after a single shot. The results indicate that the joule heating of copper rail is about 81.5 kJ occupying 200% of the energy that put into the railgun system. Such thermal energy can heat the surface of copper rail to about 260 ℃ which is much lower than the melting point of copper （1 083 ℃）. In the same way, the armature joule heating is about 991 J. The energy can heat the armature surface to about 260 ℃which is less than the melting point of the aluminium-alloy（620 ℃）. The rail and armature of electromagnetic rail gun system will not melt after a single shot.
出处
《弹道学报》
EI
CSCD
北大核心
2006年第4期38-40,44,共4页
Journal of Ballistics
关键词
电磁轨道炮
电枢
焦耳热
electromagnetic rail gun
armature
joule heating
