Reaction process of aluminized RDX-based explosives based on cylinder test
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摘要: 对RDX炸药和2种铝粉质量分数分别为15%、30%的RDX基含铝炸药进行∅50mm圆筒实验，研究铝粉含量对炸药做功能力的影响，根据格尼公式分析铝粉与爆轰产物的反应进程。结果表明：在圆筒实验记录的时间范围内，铝粉质量分数为15%的含铝炸药做功能力最强，RDX炸药次之，铝粉质量分数为30%炸药做功能力最弱；34μs时刻，铝粉质量分数为15%的炸药，铝粉的反应度为0.49，而铝粉质量分数为30%炸药铝粉的反应度仅为0.21，含铝炸药中铝粉的反应时间在50~200μs之间。Abstract: The copper cylinder tests were carried out to explore the effects of the aluminum contents on the performances of aluminized RDX-based explosives.In the tests, the outer diameter of the copper cylinder was 50 mm and the mass fractions of aluminum in the three RDX-based explosives were 0, 15% and 30%, respectively.In the three explosives tested, the acceleration ability of the explosive with the aluminum mass fraction of 15% was highest.However, the acceleration ability of the explosive with the aluminum mass fraction of 30% was lower than that of the pure RDX.The Gurney formula was used to analyze the reaction process of aluminum with detonation products in the aluminized RDX-based explosives.About 49% aluminum by mass had reacted in the explosive with the aluminum mass fraction of 15% at 34 μs, while in the explosive with the aluminum mass fraction of 30%, only about 21% aluminum by mass had reacted.And the reaction time of aluminum powder with the size of 10 μm was 50-200 μs.
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Key words:
- mechanics of explosion /
- reaction process /
- cylinder test /
- aluminized explosive /
- reaction time /
- RDX
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表 1 炸药配方
Table 1. Explosive formulations
炸药 w(RDX) w(Al) ρ/(g·cm-3) w(Al)/w(O) v/(m·s-1) RA0 100 0 1.673 0 8 325 RA15 80 15 1.763 0.257 8 121 RA30 70 30 1.865 0.632 7 879 
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表 2 圆筒实验拟合系数
Table 2. Fitting coefficients of cylinder test
炸药 a b c d v/(m·s-1) RA0 3.960 0.593 1 -3.613 -0.109 00 8 325 RA15 5.511 0.571 0 -4.601 -0.073 64 8 121 RA30 5.740 0.616 9 -4.644 -0.080 71 7 879
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表 3 含铝炸药的爆热
Table 3. Heat of aluminum explosive
炸药 ρT/(g·cm-3) ρ0/(g·cm-3) Q/(MJ·kg-1) Qe/(MJ·kg-1) Q(Al)/(MJ·kg-1) RA0 1.737 1.677 5.637 5.637 - RA15 1.817 1.775 6.489 4.801 1.688 RA30 1.906 1.861 7.324 3.950 3.374
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