TY - JOUR
T1 - 爆炸冲击波作用下黑索今基含铝炸药的冲击点火反应速率模型
AU - Wang, Hongfu
AU - Bai, Fan
AU - Liu, Yan
AU - Duan, Zhuoping
AU - Huang, Fenglei
N1 - Publisher Copyright:
© 2021, Editorial Board of Acta Armamentarii. All right reserved.
PY - 2021/2
Y1 - 2021/2
N2 - The shock initiation of aluminized explosives was experimented and simulated to investigate the influence of constituent aluminum powder sizes on shock ignition and establish a microscopic reaction rate model for shock ignition of the RDX-based aluminized explosives. Four explosive formulae with the same initial component ratio and RDX particle size but with different aluminum grain sizes (5 μm, 16 μm, 40 μm and 100 μm) were designed, and the shock initiation experiments were conducted for these four RDX-based aluminized explosives. At the same time, a microscopic ignition model of RDX-based aluminized explosives was proposed by reasonable assumption, a microscopic reaction rate model considering the ignition growth was established, and the above experiments were numerically modeled by using this microscopic reaction rate model and I&G model of aluminized explosives. The experimental and simulated results show that 0.80%, 2.45%, 3.20% and 4.15% of aluminum are involved in the reaction for RDX-based aluminized explosives with 100 μm, 40 μm 16 μm and 5 μm aluminum powders in front of the CJ plane, respectively; with the decrease in aluminum powder sizes in aluminized explosives, the reaction rate of aluminum powders in front of the CJ plane increases, the faster the propagation velocity of the precursory shock wave increases, the greater the peak pressures in aluminized explosives are, and the time interval between the occurrence time of the peak pressure and the arrival time of the precursory shock wave are shorter, the explosive impact sensitivity increases. The pressure calculated using this microscopic reaction rate model are more reasonable agreement with the experimental results compared with I&G model. The microscopic model is applicable for simulating the reaction characteristics of large size aluminum powder in RDX-based aluminized explosives (the diameter of aluminum powder is larger than 1/10 of the explosive particle size) for the shock ignition process. For RDX-based aluminized explosives with 100 μm and 40 μm aluminum powders, the maximum error between the calculated parameters and the experimental results for arrival time of precursory shock wave, peak-pressure time and peak pressure at each Lagrange position is less than 10%.
AB - The shock initiation of aluminized explosives was experimented and simulated to investigate the influence of constituent aluminum powder sizes on shock ignition and establish a microscopic reaction rate model for shock ignition of the RDX-based aluminized explosives. Four explosive formulae with the same initial component ratio and RDX particle size but with different aluminum grain sizes (5 μm, 16 μm, 40 μm and 100 μm) were designed, and the shock initiation experiments were conducted for these four RDX-based aluminized explosives. At the same time, a microscopic ignition model of RDX-based aluminized explosives was proposed by reasonable assumption, a microscopic reaction rate model considering the ignition growth was established, and the above experiments were numerically modeled by using this microscopic reaction rate model and I&G model of aluminized explosives. The experimental and simulated results show that 0.80%, 2.45%, 3.20% and 4.15% of aluminum are involved in the reaction for RDX-based aluminized explosives with 100 μm, 40 μm 16 μm and 5 μm aluminum powders in front of the CJ plane, respectively; with the decrease in aluminum powder sizes in aluminized explosives, the reaction rate of aluminum powders in front of the CJ plane increases, the faster the propagation velocity of the precursory shock wave increases, the greater the peak pressures in aluminized explosives are, and the time interval between the occurrence time of the peak pressure and the arrival time of the precursory shock wave are shorter, the explosive impact sensitivity increases. The pressure calculated using this microscopic reaction rate model are more reasonable agreement with the experimental results compared with I&G model. The microscopic model is applicable for simulating the reaction characteristics of large size aluminum powder in RDX-based aluminized explosives (the diameter of aluminum powder is larger than 1/10 of the explosive particle size) for the shock ignition process. For RDX-based aluminized explosives with 100 μm and 40 μm aluminum powders, the maximum error between the calculated parameters and the experimental results for arrival time of precursory shock wave, peak-pressure time and peak pressure at each Lagrange position is less than 10%.
KW - Aluminized explosive
KW - Aluminum particle size
KW - Hot-spot
KW - Microscopic ignition model
KW - Reaction characteristic
UR - http://www.scopus.com/inward/record.url?scp=85104297984&partnerID=8YFLogxK
U2 - 10.3969/j.issn.1000-1093.2021.02.011
DO - 10.3969/j.issn.1000-1093.2021.02.011
M3 - 文章
AN - SCOPUS:85104297984
SN - 1000-1093
VL - 42
SP - 327
EP - 339
JO - Binggong Xuebao/Acta Armamentarii
JF - Binggong Xuebao/Acta Armamentarii
IS - 2
ER -