底排燃气二次扩张压力场研究

摘要

提出了底排燃气压力不随外部压力变化既可改善底部弹射击精度又可提高减阻效果的二次扩张原理,建立了底排燃气二次扩张压力的计算模型,并通过采用二次扩张原理的新型底排装置与传统底排装置的对比试验,验证了新型底排装置结构实现的可行性.%A secondary expansive principle of the burning gas pressure vary without the external pressure is presented in this paper. It can be used not only to change the fire precision of the base bleed projectile,but also to improve the effect of reduction drag and expansion range. The calculating model of the secondary expansive pressure of the burning gas is constructed. By means of analysis of the experimental resuits,it has been confirmed that the new base bleed device can be designed, with the se condary expansive principle of the burning gas pressure.