Energy release characteristics of PTFE/Al/TiH2 reactive jet with different TiH2 content

Jiang, Chunlan; Zhang, Jingbo; Hu, Rong; Mao, Liang; Li, Ming

doi:10.1016/j.dt.2024.03.002

Defence Technology

2024

DOI: 10.1016/j.dt.2024.03.002

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Energy release characteristics of PTFE/Al/TiH2 reactive jet with different TiH2 content

Chunlan Jiang,

Jingbo Zhang,

Rong Hu

et al.

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Cited by 3 publications

References 15 publications

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Impact-induced energy release characteristics of Ti-Zr-Hf-Ta high-entropy alloys by using a temperature-pressure synchronous measurement method

Sui,

Wang,

Guo

et al. 2024

Journal of Alloys and Compounds

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Impact-induced energy release characteristics of Ti-Zr-Hf-Ta high-entropy alloys by using a temperature-pressure synchronous measurement method

Sui,

Wang,

Guo

et al. 2024

Journal of Alloys and Compounds

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The coupling enhancement of air overpressure by aluminium/polytetrafluoroethylene cylindrical shell under inner explosive loading

Du,

Guo,

et al. 2025

Physics of Fluids

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To study the reaction behavior of Al/PTFE (Aluminum/Polytetrafluoroethylene) cylindrical shells under inner explosive loading, this paper conducted explosive-driven experiments. The results showed that the flame duration of the reactive samples increased by 448.6% compared to the control group, and the peak overpressure increased by 40% compared to the control group. By comparing the differences between the flame images and overpressure–time curves of different samples, it was found that the anaerobic reaction occurring immediately after detonation significantly enhances the shock wave parameters, particularly the peak overpressure, while the subsequent aerobic reaction has a relatively minor effect on these parameters. To describe the enhancement of the shock wave parameters by the anaerobic reaction, a theoretical model was established from the perspective of shock wave coupling. In this model, the trailing shock wave generated by the Al/PTFE catches up and superimposes the leading shock wave generated by the explosive. During this process of catching up and superposition, the overpressure–time curve of the air shock wave transforms from a double-peak structure to a single-peak structure, and the peak overpressure is enhanced after such transformation. As the explosive mass increases, the air shock wave begins to be enhanced at a distance closer to the explosion center, and the duration of the double-peak structure decreases. Furthermore, as the propagation distance increases, the sample with the highest normalized enhancement rate shows a gradual decrease in the proportion of reactive material. These findings provide a valuable reference for the application of Al/PTFE shells combined with explosives.

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Numerical simulation study on the matching of third-generation explosives and large-caliber reactive shaped charge

Yao,

Yan,

Zhang

2024

J. Phys.: Conf. Ser.

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In order to further study the matching problem between the third-generation explosives and the large-diameter active shaped jet charge, the jet forming characteristics and thermo-mechanical coupling characteristics were studied based on the AUTODYN-2D finite element analysis platform. The evolution behavior and distribution law of pressure field, velocity field and temperature field during the active jet forming process were analyzed, and the active jet forming law under different charge structures was analyzed. The numerical simulation results show that the large-diameter active energy-gathering structure under the condition of the third-generation explosive charge can form a stable active jet. With the extension of the jet forming time, the high-pressure zone and the high-temperature zone have obvious movement and diffusion phenomena. The high-speed zone moves from the middle of the axis to the head of the jet, resulting in a velocity difference between the head and tail of the jet. In addition, the penetration ability parameters of PTFE / AL active jet, such as head velocity and effective jet length, are significantly improved by the third generation explosives, especially CL-20 explosives, and are significantly affected by the charge type, the thickness of the active liner and the cone angle of the liner.

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Energy release characteristics of PTFE/Al/TiH2 reactive jet with different TiH2 content

Cited by 3 publications

References 15 publications

Impact-induced energy release characteristics of Ti-Zr-Hf-Ta high-entropy alloys by using a temperature-pressure synchronous measurement method

Impact-induced energy release characteristics of Ti-Zr-Hf-Ta high-entropy alloys by using a temperature-pressure synchronous measurement method

The coupling enhancement of air overpressure by aluminium/polytetrafluoroethylene cylindrical shell under inner explosive loading

Numerical simulation study on the matching of third-generation explosives and large-caliber reactive shaped charge

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