Experimental Performance Assessment of Thermobaric Explosives in Free Field and Internal Blast Tests

Q. P. Xu; Zh R. Li; X. J. Wang; J. J. Su; Y. Liu; F. L. Huang

doi:10.1134/S0010508222010105

Experimental Performance Assessment of Thermobaric Explosives in Free Field and Internal Blast Tests

Q. P. Xu, Zh R. Li, X. J. Wang^*, J. J. Su^*, Y. Liu, F. L. Huang

^*Corresponding author for this work

School of Mechatronical Engineering

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Abstract: In the present study, various test methods in the free field and confined explosions of cast HMX-based thermobaric explosives (TBX) and TNT are applied to quantify the explosion performance of TBX. The results show that the Mach reflection overpressure $$\Delta p$$ and impulse $$I$$ of TBX in the free field are much larger than those of TNT at the same relative distance from the explosion center. Based on the measured experimental data, semi-empirical formulas for calculating the overpressure at different distances from the TNT and TBX charges are derived. The fireball temperature and the duration of temperature higher than 1500°C of TBX are seen to be significantly greater. The measured peak pressure of the two explosives blast in an explosion tank are compared with the values predicted by modified calculation models, and the results are in good agreement. In addition, the quasi-static pressure generated by TBX in the explosion tank is 30.9% higher than that of TNT, which obviously reveals thermobaric effects of TBX. Based on the overpressure and quasi-static pressure calculation model, the TNT equivalents of TBX are calculated to correctly evaluate the TBX performance. The related contents in this paper will guide the formulation and performance assessment of TBX.

Original language	English
Pages (from-to)	93-105
Number of pages	13
Journal	Combustion, Explosion and Shock Waves
Volume	58
Issue number	1
DOIs	https://doi.org/10.1134/S0010508222010105
Publication status	Published - Feb 2022

Keywords

free field blast
internal blast
quasi-static pressure
reflection pressure
thermal effect
thermobaric

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title = "Experimental Performance Assessment of Thermobaric Explosives in Free Field and Internal Blast Tests",

abstract = "Abstract: In the present study, various test methods in the free field and confined explosions of cast HMX-based thermobaric explosives (TBX) and TNT are applied to quantify the explosion performance of TBX. The results show that the Mach reflection overpressure $$\Delta p$$ and impulse $$I$$ of TBX in the free field are much larger than those of TNT at the same relative distance from the explosion center. Based on the measured experimental data, semi-empirical formulas for calculating the overpressure at different distances from the TNT and TBX charges are derived. The fireball temperature and the duration of temperature higher than 1500°C of TBX are seen to be significantly greater. The measured peak pressure of the two explosives blast in an explosion tank are compared with the values predicted by modified calculation models, and the results are in good agreement. In addition, the quasi-static pressure generated by TBX in the explosion tank is 30.9% higher than that of TNT, which obviously reveals thermobaric effects of TBX. Based on the overpressure and quasi-static pressure calculation model, the TNT equivalents of TBX are calculated to correctly evaluate the TBX performance. The related contents in this paper will guide the formulation and performance assessment of TBX.",

keywords = "free field blast, internal blast, quasi-static pressure, reflection pressure, thermal effect, thermobaric",

author = "Xu, {Q. P.} and Li, {Zh R.} and Wang, {X. J.} and Su, {J. J.} and Y. Liu and Huang, {F. L.}",

note = "Publisher Copyright: {\textcopyright} 2022, Pleiades Publishing, Ltd.",

year = "2022",

month = feb,

doi = "10.1134/S0010508222010105",

language = "English",

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AU - Xu, Q. P.

AU - Li, Zh R.

AU - Wang, X. J.

AU - Su, J. J.

AU - Liu, Y.

AU - Huang, F. L.

PY - 2022/2

Y1 - 2022/2

N2 - Abstract: In the present study, various test methods in the free field and confined explosions of cast HMX-based thermobaric explosives (TBX) and TNT are applied to quantify the explosion performance of TBX. The results show that the Mach reflection overpressure $$\Delta p$$ and impulse $$I$$ of TBX in the free field are much larger than those of TNT at the same relative distance from the explosion center. Based on the measured experimental data, semi-empirical formulas for calculating the overpressure at different distances from the TNT and TBX charges are derived. The fireball temperature and the duration of temperature higher than 1500°C of TBX are seen to be significantly greater. The measured peak pressure of the two explosives blast in an explosion tank are compared with the values predicted by modified calculation models, and the results are in good agreement. In addition, the quasi-static pressure generated by TBX in the explosion tank is 30.9% higher than that of TNT, which obviously reveals thermobaric effects of TBX. Based on the overpressure and quasi-static pressure calculation model, the TNT equivalents of TBX are calculated to correctly evaluate the TBX performance. The related contents in this paper will guide the formulation and performance assessment of TBX.

AB - Abstract: In the present study, various test methods in the free field and confined explosions of cast HMX-based thermobaric explosives (TBX) and TNT are applied to quantify the explosion performance of TBX. The results show that the Mach reflection overpressure $$\Delta p$$ and impulse $$I$$ of TBX in the free field are much larger than those of TNT at the same relative distance from the explosion center. Based on the measured experimental data, semi-empirical formulas for calculating the overpressure at different distances from the TNT and TBX charges are derived. The fireball temperature and the duration of temperature higher than 1500°C of TBX are seen to be significantly greater. The measured peak pressure of the two explosives blast in an explosion tank are compared with the values predicted by modified calculation models, and the results are in good agreement. In addition, the quasi-static pressure generated by TBX in the explosion tank is 30.9% higher than that of TNT, which obviously reveals thermobaric effects of TBX. Based on the overpressure and quasi-static pressure calculation model, the TNT equivalents of TBX are calculated to correctly evaluate the TBX performance. The related contents in this paper will guide the formulation and performance assessment of TBX.

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KW - thermal effect

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Experimental Performance Assessment of Thermobaric Explosives in Free Field and Internal Blast Tests

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