Cook-off Experimental and Numerical Simulation of RDX-based Aluminized Explosives

doi:10.3969/j.issn.1000-1093.2019.05.010

Abstract

Abstract: The aluminum powders change the internal heat transfer mechanism of the aluminized explosive to affect the thermal reaction of the explosive during cook-off. The thermal reaction characteristics of the aluminized explosive was studied. The cook-off experiment of RDX/WAX (96/4) explosive was carried out using the method of multi-point temperature measuring, and the kinetic model parameters of RDX explosive were calibrated by comparing the experimental and calculated changing temperatures at different positions. The multi-point temperature measuring and bomb cook-off experiments of RDX/Al/binder (60/31/9) and TNT/RDX/Al (60/24/16) were performed to obtain the internal temperature and ignition time. A calculation model for the thermal reaction of aluminium explosives is established to calculate and analyze the thermal reaction characteristics of the explosives. In the simulation,the endothermic and heat conduction of aluminum powder for RDX/Al/binder, the phase transition and multi-step thermal decomposition reactions for TNT/RDX/Al, and the heat absorption of aluminum powder were considered, and a multi-component grid cell calculation method was used. The correctness of the calculated results was verified by comparing to the experimental results. The results show that the addition of aluminum powder accelerates the internal heat transfer rate of RDX/Al/binder (60/31/9), of which ignition time is shorten so that the thermal safety of explosive is lower, and has no significant effect on the heat transfer process of TNT/RDX/Al (60/24/16). Key

Key words: aluminizedexplosive, thermalreactioncharacteristic, cookoffexperiment, numericalsimulation

CLC Number:

TQ564.3
TJ55

KOU Yongfeng， CHEN Lang， MA Xin， ZHAO Pin， LU Jianying， WU Junying. Cook-off Experimental and Numerical Simulation of RDX-based Aluminized Explosives[J]. Acta Armamentarii, 2019, 40(5): 978-989.

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第40卷第5期
2019 年5月兵工学报ACTA
ARMAMENTARIIVol.40No.5May2019

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