摘要
通过射流对固体火箭发动机的冲击起爆的数值模拟,根据Held起爆判据,确定了固体发动机的起爆阈值。数值仿真结果表明,81 mm标准射流弹能够形成头部速度达到6100 m/s的聚能射流,当该聚能射流直接冲击发动机后,推进剂受到射流侵彻发生剧烈反应,球形冲击波向另一侧推进剂径向传播,导致推进剂发生二次反应,推进剂内部观察点的压力峰值达到40 GPa以上,反应度为1,表明推进剂发生了完全爆轰;通过调节靶板的厚度获得不同的射流能量,计算发动机的临界起爆阈值v^(2)d约为126.03 mm^(3)·μs^(-2)。
Based on Held’s criterion,the initiation threshold of solid engine was obtained by the numerical simulation on impacting initiation of jet to solid-rocket engine.The numerical simulation results show that the81 mm standard jet projectile could form a jet with a head speed of 6100 m/s.When the engine was directly impacted by the jet,the propellant had a violent reaction.The spherical shock wave propagated along the radial direction to the other side of the propellant,resulting in the secondary reaction of the propellant.The peak of pressure at the internal observation point of the propellant reached over 40 GPa and the reactivity(ALPHA)reached 1,indicating that the propellant underwent detonation.By adjusting the thickness of the target plate to obtain different jet energy(v2d),the critical detonation threshold v^(2)d of the engine was calculated to be about 126.03 mm^(3)·μs^(-2).
作者
石浩男
戴开达
张媛
向召
赵猛
李苗苗
陈静静
SHI Haonan;DAI Kaida;ZHANG Yuan;XIANG Zhao;ZHAO Meng;LI Miaomiao;CHEN Jingjing(State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;Beijing No.13 High School, Beijing 100120, China;Shanghai Space Propulsion Technology Research Institute, Huzhou 313000, China)
出处
《兵器装备工程学报》
CSCD
北大核心
2022年第6期24-28,78,共6页
Journal of Ordnance Equipment Engineering
基金
装备预研领域基金项目(61407200204)。
关键词
固体火箭发动机
聚能射流
冲击起爆
起爆阈值
solid-rocket engine
sharped-charge jet
shock initiation
initiation threshold
作者简介
石浩男(1996—),男,硕士,E-mail:3120190139@bit.edu.cn;通信作者:戴开达(1978—),男,博士,副教授,E-mail:daikaida@bit.edu.cn。
