摘要
PBXN-109类型号含铝高能炸药,爆炸效应与传统理想装药差异较大,其RDX等高爆组份的能量可近似认为在爆轰波阵面上释放,而铝粉等非理想组份的能量,则在爆轰波阵面后依据各自的内在化学反应规律逐渐释放,释放速率与颗粒所处外部环境及颗粒自身几何物理特性等因素相关。以PBXN-109装药中常规铝粉粒径为基准,对含不同铝粉颗粒尺度装药爆炸效应开展系统分析,结果表明并不需要刻意区分铝粉燃烧能量释放为C-J波阵面释放或后燃烧释放。当铝粉颗粒非常细小时,燃烧反应时间很短,能量释放非常迅速,其效果类似于C-J面释放,远区冲击波与理想爆轰相近;当铝粉颗粒较大时,完全燃烧反应需要时间较长,受燃烧条件制约不能完全燃烧,能量无法充分释放,且大部分释放的能量也不能有效增强冲击波,故冲击波波峰峰值较小。
For PBXN-109 type aluminum-containing high explosives,the explosive effects exhibit significant differences from traditional ideal explosives.In such charges,the energy of high explosive components like RDX can be approximated as being released at the detonation wave front,while the energy from non-ideal components such as aluminum powder is gradually released after the detonation wave front based on their intrinsic chemical reaction mechanisms.The release rate is influenced by factors such as the external environment and the geometric and physical properties of the particles.Using the conventional particle size of aluminum powder in PBXN-109 as a baseline,a systematic analysis of the explosive effects of charges with varying aluminum powder particle sizes was conducted.The results indicate that it is unnecessary to explicitly differentiate the combustion energy release of aluminum powder as either occurring at the C-J wave front or in post-combustion.When aluminum powder particles are very fine,the combustion reaction time is short and energy is released very rapidly,resembling release behavior similar to that at the C-J front,resulting in shock waves comparable to ideal detonations in the far field.Conversely,when the aluminum powder particles are larger,the complete combustion reaction takes longer,constrained by combustion conditions,leading to incomplete combustion and insufficient energy release.Consequently,much of the energy released fails to effectively enhance the shock wave,resulting in a lower peak pressure of the shock wave.
作者
何勇
邓国强
张国凯
吴玉欣
杨晓宁
张效晗
HE Yong;DENG Guoqiang;ZHANG Guokai;WU Yuxin;YANG Xiaoning;ZHANG Xiaohan(Nanjing University of Science and Technology;Defense Engineering Institute,AMS,PLA)
出处
《防护工程》
2025年第1期20-28,共9页
Protective Engineering
基金
国家自然科学基金项目(52278504)
江苏省自然科学基金项目(BK20220141)
关键词
高能装药
铝粉
粒径
爆炸效应
数值仿真
high-energy charge
aluminum powder
particle size
explosive effect
numerical simulation
