Temperature effect on the shock initiation and metal accelerating behavior for TATB/RDX-based explosive
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摘要: 为了获得环境温度对TATB/RDX传爆药起传爆性能及驱动性能的影响特性，采用激光多普勒测速技术及瞬态太赫兹波多普勒干涉测速技术，对TATB/RDX传爆药在隔层起爆条件下的起爆、传播及驱动性能开展实验研究，获取了–45~70 ℃温度环境中TATB/RDX传爆药的到爆轰距离、爆轰反应区时间宽度、爆轰传播速度及驱动飞片的飞行速度曲线。结果表明：TATB/RDX传爆药的到爆轰距离及爆轰反应区时间宽度随环境温度的降低均近乎呈线性增长趋势；爆轰传播速度随环境温度的降低而逐渐提高；驱动飞片的速度随环境温度的变化特性在飞片主体-层裂层融合前后存在明显不同。
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关键词:
- TATB/RDX传爆药 /
- 到爆轰距离 /
- 爆轰传播 /
- 飞片速度 /
- 环境温度
Abstract: 1 550 nm photon Doppler velocimetry and terahertz-wave Doppler interferometric velocimetry were used in the initiating and flyer driven experiments to gain data on the temperature effect for the TATB/RDX based explosive. Explosive/window interfacial velocity, run distance to detonation and the velocity of flyer driven by the explosive were measured respectively at different temperature. Experiment results at temperature –45, 20, and 70 ℃ reveal that the run distance to detonation, the reaction zone time width and the detonation phase velocity decrease with temperature. In particular, the run distance to detonation and the reaction zone time width both decrease almost linearly, while the linear coefficient is found to be 0.015 mm/℃ and 0.165 ns/℃, respectively. With the increase of temperature, the detonation phase velocity of TATB/RDX based explosive decreases nonlinearly, which differs from TATB based IHEs, for which it decreases linearly. Four stages obviously exist during the motion of the flyer, i.e., spallation, pursuit, remerging and the united flyer. Divergent or grazing detonation driving condition can be resolved based on the analysis for the spallation duration in big plate driven experiment. The peak velocity and the velocity during spallation for the flyer vary with temperature in the same trend. The velocity at ambient temperature is the highest, hot one is the next and then the cold one. This may be related to the different reaction zone performance at different temperature. When the flyer united as a whole again, the final velocity under cold environment turns to be the highest one, the hot result almost equals to the ambient one, which may be related to the different detonation product performance at different temperature. The metal accelerating behavior at different temperature indicates that the reaction zone and the detonation product for TATB/RDX based explosive vary with temperature with the different path, which need more experiment data and numerical simulation for further investigation. -
图 1 炸药/窗口界面粒子速度测量实验装置
Figure 1. Experimental setup for the explosive/window interfacial velocity test
图 2 炸药冲击转爆轰测量实验装置
Figure 2. Experimental setup for the explosive shock to detonation transition test
图 7 –45～70 ℃温度环境中TATB/RDX传爆药的起传爆速度
Figure 7. Front velocity for hot and cold TATB/RDX explosives at the temperature from –45 ℃ to 70 ℃
图 8 温度对TATB/RDX传爆药到爆轰距离的影响
Figure 8. Run distance to detonation varied with temperature for TATB/RDX explosive
图 9 温度对TATB/RDX传爆药爆轰波波速的影响
Figure 9. Detonation phase velocity varied with temperature for TATB/RDX explosive
图 10 温度对TATB/RDX传爆药爆轰反应区时间宽度的影响
Figure 10. Chemical reaction zone varied with temperature for TATB/RDX explosive
图 11 TATB/RDX传爆药驱动飞片的典型速度曲线
Figure 11. Typical velocity of flyer driven by TATB/RDX explosive
图 12 不同位置处TATB/RDX传爆药驱动飞片的速度对比
Figure 12. Velocity comparison of flyer at different point of TATB/RDX explosive
图 13 飞片各点层裂层飞行持续时间的对比
Figure 13. Flying duration comparison of the spallation at different points
图 14 散心爆轰驱动向滑移爆轰驱动的转变
Figure 14. Transformation from divergent detonation to grazing detonation
图 15 温度对飞片各位置飞行速度的影响
Figure 15. Temperature effect on the flyer velocity at different positions
图 16 待测炸药/LiF窗口典型粒子速度曲线
Figure 16. Typical particle velocity between the explosive sample and window
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