底排参数对底部排气弹弹道特性的影响  

Effects of Base-Bleed Parameters on Ballistic Characteristics of Base-Bleed Projectile

作　　者：谢利平[1,2] 史金光[1] 李元生 

机构地区：[1]南京理工大学能源与动力工程学院,南京210094 [2]沈阳炮兵学院电子侦察系,沈阳110867 [3]中国船舶工业系统工程研究院,北京100094

出　　处：《兵器装备工程学报》2016年第1期34-39,共6页Journal of Ordnance Equipment Engineering

基　　金：中国博士后科学基金项目(2013M541676)

摘　　要：为研究不同底排条件下底部排气弹的弹道特性,探讨了底排药剂燃烧和减阻机理,建立了底排内弹道和外弹道模型,分析了底排装置结构参数和药剂燃速系数等对底部排气弹减阻增程效果的影响;结果表明:一定范围内药柱长度的增加能显著提高增程率,但药柱长度过长会由于燃气的引射作用降低增程率;减小药柱内径和增大喷口直径可以提高底部排气弹增程率;分瓣数的增加对提高增程率有较大作用,但应考虑对工程实现的影响;研究范围内存在最优药柱长度和燃速系数;总阻减阻率随着底排工作时间总是经历一个先增大后减小的过程。To study ballistic characteristics of base-bleed projectile under different base-bleed conditions, the mechanism of base-bleed grain combustion and drag decrease were discussed. Then the model of interior ballistics and exterior ballistics of base-bleed projectile was established and used to analyze influence of the structure parameters and combustion rate coefficient of base-bleed unit on range-increase and drag-decrease effects of base-bleed projectile. Results show that, the diminution of grain inner diameter, the augmentaion of grain length, section number and nozzle diameter can help to increase the range-increase rate in a certain range, but the influence on engineering realization should be considered; there is a best grain length and combustion rate coefficient in certain range, and the total drag-decrease rate increases firstly and then decreases with time goes.

关 键 词：底部排气弹 底排参数 弹道特性 增程率 减阻率 

分 类 号：TJ012.3[兵器科学与技术—兵器发射理论与技术]