Effects of shell constraints on flow characteristicsin an explosive dispersal of a liquid volume
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摘要: 进行了不同壳体约束条件下的液体爆炸抛撒实验，讨论了壳体对起爆后早期抛撒流场特征的影响，分析了爆炸分散过程中液体的状态变化和破碎分散机理，并通过数值模拟进行了对比分析。结果表明，在爆炸反射稀疏波的作用下液体发生空化现象，壳体强度越高，空化发生的延迟越大，发生位置越靠近爆心，同时，爆炸产物气体与液体在其界面附近越早发生掺混。Abstract: In this study, experimental investigations on the liquid's explosive dispersal under different shell constraints were carried out, effects of shell constraints on the early characteristics of the flow field were discussed, and the mechanism for liquid state transition and breakup was analyzed and compared with the numerical simulation. The results show that cavitation occurs in the liquid when the rarefaction waves reflects on the shell. The stronger the shell constraint, the greater the delay of the cavitation that emerges and the closer to the center where the cavitation is located, and the earlier the explosive product mixes with the liquid on the nearby interfaces.
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图 2 不同壳体材料的爆炸分散装置
Figure 2. Explosive dispersion devices made of different shell materials
图 7 起爆后1 ms液体与爆炸产物气体界面形态
Figure 7. Configurations of interfaces between liquid and explosive product at 1 ms after detonation
图 8 不同材料壳体情况起爆后不同时刻压力的径向分布
Figure 8. Radial distribution of pressure at different times after detonation for different shells
图 9 不同材料壳体情况起爆后不同时刻水中空化气泡的发展
Figure 9. Cavitation in water at different times after detonation for different shells
表 1 计算参数
Table 1. Calculation parameters
部位 材料 ri/mm ro/mm ρ0/(kg·m-3) K/GPa G/GPa S/MPa η/% 炸药 RDX - 4.50 1 630 - - - - 液体 水 5.50 52.25 1 000 - - 40 - 爆管 塑料 4.50 5.50 1 265 2 0.5 34.5 3.5 有机玻璃 52.25 53.25 1 180 3.92 0.035 70 0.5 壳体 PVC 52.25 55.25 1 380 4.82 1.22 65 0.5 不锈钢 52.25 55.25 7 860 167.00 73.00 600 0.4 
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期刊类型引用(7)
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百度学术2. 侯帅，赵奇志，白海军，王洪波，高寒，吴莹，陈雍. 典型液体爆炸分散数值仿真与试验研究. 防化研究. 2023(01): 56-64 . 百度学术3. Lei Li，Xiao-xia Lu，Xiao-bin Ren，Ye-jun Ren，Shou-tian Zhao，Xiao-fang Yan. The mechanism of liquid dispersing from a cylinder driven by central dynamic shock loading. Defence Technology. 2021(04): 1313-1325 . 必应学术4. 李廷，梁婷，李江存，孙航，蒋志刚. 基于分装结构的CS刺激剂爆炸分散过程研究. 含能材料. 2020(03): 255-260 . 百度学术5. 王永旭，解立峰，贾晓亮，张莹，李斌. 300kg装药FAE燃料爆炸抛撒成雾的实验研究. 爆破器材. 2020(02): 23-28 . 百度学术6. 李廷，梁婷，李江存，蒋志刚，龚皓. 爆炸分散过程的数值模拟研究进展. 当代化工. 2019(08): 1846-1849 . 百度学术7. 刘志龙，王玄玉，姚伟召，董文杰，白海涛. 短切碳纤维爆炸分散特征及云团参数变化规律实验研究. 含能材料. 2019(09): 773-778 . 百度学术其他类型引用(2)
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