Research on Parameters Determination of JWL EOS for Commercial Explosives Based on Underwater Explosion Test

doi:10.3969/j.issn.1000-1093.2020.03.009

Abstract

Abstract: In order to conveniently and reliably determine the JWL equation of state (JWL EOS) for detonation products of commercial explosives, an underwater explosion measurement system with a self-developed continuous pressure-conducted velocity probe was designed for measuring the oblique shock wave induced by underwater explosion of cylindrical charge. This system was used to obtain the time history curves of detonation-shock wave front in 3 groups of underwater explosion tests of modified ammonium nitrate / fuel oil (ANFO) charge. The wave fronts were plotted, and other parameters, such as detonation pressure, adiabatic exponent, and included angle of water-gas interface, were calculated by analyzing the underwater explosion of cylindrical charge in two-dimensional steady flow field.Two-dimensional axial-symmetric model of cylindrical charge is built using Autodyn program, and the numerically simulated results of oblique shock wave front and included angle of water-gas interface are compared with the experimental results. The parameters for JWL EOS of modified ANFO are determined by test-and-error method. The simulated results are in agreement with the experimental results. The results show that the error of oblique shock wave front is less than ±5%, and the error of included angle of water-gas interface is less than ±3%. The proposed method is reasonable and reliable for determining the parameters of JWL EOS of large scale commericial explosive. Key

Key words: commercialexplosive, underwaterexplosion, ammoniumnitratefueloil, JWLequationofstate, continuouspressure-conductedvelocityprobe

CLC Number:

O383⁺.1

LI Kebin， DONG Xinlong， LI Xiaojie， YAN Honghao， WANG Xiaohong. Research on Parameters Determination of JWL EOS for Commercial Explosives Based on Underwater Explosion Test[J]. Acta Armamentarii, 2020, 41(3): 488-494.

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第41卷
第3期2020 年3月兵工学报ACTA
ARMAMENTARIIVol.41No.3Mar.2020

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