基于药柱变燃速燃烧的底排减阻增程方法  

Method of Drag Reduction and Extend Range Based on Variable Burning Rate of Base Bleed Propellant

作　　者：张竹伟 张领科[1] 

机构地区：[1]南京理工大学能源与动力工程学院,江苏南京210094

出　　处：《含能材料》2017年第11期925-931,共7页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金资助(51106075)

摘　　要：为了深入研究底部排气弹减阻增程的特性,进一步提高弹丸的射程。针对国内某155 mm底排弹,建立了不同燃速燃烧的底排药柱、变燃速燃烧的包覆药柱和药柱包覆层位置的变化三种情况下的燃烧模型,模型中引入了燃速改变系数,并通过数值计算分析了其对底排弹减阻和增程的影响。结果表明,当燃速改变系数从0.7增加到1.2时,底排工作时间减少27.08 s,射程减少1.16 km,增程率减少3.86%;变燃速燃烧的药柱在内层采用高燃速燃烧,外层采用低燃速燃烧的增程率可达32.33%;对药柱分层燃烧位置优化后,在距药柱内环约1/4处有最佳射程39.76 km。因此,可以通过寻求底排药柱最优的分层位置,采用变燃速燃烧的方法来改善底排弹减阻增程特性,且这种方法具有普遍适用性。In order to research the drag reduction and extend range characteristics of base bleed projectile, the three burning models were established for base bleed propellant with different burning rate, cladding propellant with variable burning rate and different cladding layer position of propellant for 155 mm base bleed projectile. The drag reduction and extend range characteristics of base bleed projectile were calculated and analyzed numerically by introducing the burning rate change coefficient. Results show that the burning rate change coefficient increases from 0.7 to 1.2, the working time of the base bleed reduces 27.08 s, the firing range reduces 1.16 km and the extend range rate increases 3.86%. The extend range rate is 32.33% by using the variable burning rate propellant, which the inner layer burning rate is higher than outer layer. The maximum firing range is 39.76 km by optimizing the propellant at 1/4 of the inner ring. Therefore, the drag reduction and extend range characteristics of base bleed projectile could be improved by optimizing the layer position and using variable burning rate of base bleed propellant.

关 键 词：底部排气弹 底排药柱 可变燃速 减阻 增程 

分 类 号：TQ560.1[化学工程—炸药化工]