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兵工学报 ›› 2025, Vol. 46 ›› Issue (6): 240382-.doi: 10.12382/bgxb.2024.0382

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CL-20基含铝炸药超压爆轰实验及其状态方程标定

刘沫言1, 刘彦1,2,*(), 白帆1,**(), 杨利1, 何超1, 王虹富1,3, 高晨宇1, 黄风雷1   

  1. 1 北京理工大学 爆炸科学与安全防护全国重点实验室, 北京 100081
    2 北京理工大学重庆创新中心, 重庆 401120
    3 中国兵器科学研究院, 北京 100089
  • 收稿日期:2024-05-17 上线日期:2025-06-28
  • 通讯作者:
  • 基金资助:
    国家自然科学基金项目(11872120); 爆炸科学与安全防护全国重点实验室基金项目(QNKT22-01)

Overdriven Detonation Test of CL-20-based Aluminized Explosive and Determination of Its Equation of State

LIU Moyan1, LIU Yan1,2,*(), BAI Fan1,**(), YANG Li1, HE Chao1, WANG Hongfu1,3, GAO Chenyu1, HUANG Fenglei1   

  1. 1 State Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology, Beijing 100081, China
    2 Beijing Institute of Technology Chongqing Innovation Center, Chongqing 401120, China
    3 China Research and Development Academy of Machinery Equipment, Beijing 100089, China
  • Received:2024-05-17 Online:2025-06-28

摘要:

高能炸药在装药结构、不同起爆方式等强载荷激励下产生的超压爆轰状态,可提高炸药能量释放能力。针对新型六硝基六氮杂异伍兹烷(Hexanitrohexaazaisowurtzitane,CL-20)基含铝炸药在超压爆轰作功下的核心问题,就是如何准确表征超压爆轰产物的状态。为此,基于阻抗匹配法测试了CL-20基含铝炸药在超压爆轰条件下的粒子速度,计算冲击波在不同介质中的界面压力,确定CL-20基含铝炸药爆轰反应区的特征参量,结合实数遗传算法(Real-Arithmetic Genetic Algorithm,RA-GA),标定爆轰产物的JWL+多方指数γ状态方程参数,并揭示不同爆轰产物状态方程对超压爆轰雨贡纽压力的影响。研究结果表明:当铝粉含量为0%~30%时,CL-20基含铝炸药超压爆轰反应区持续时间、爆轰反应区宽度与铝粉含量呈正比,较无添加铝粉的反应区宽度增加了1.97~2.7倍,但爆轰应区能量释放效率与铝粉含量呈反比;铝粉含量相同时,添加AP后爆轰反应区能量释放效率降低了25%。另相较于现有超压爆轰状态方程,采用JWL+γ方程能较好地标定超压雨贡纽参数和C-J状态的等熵膨胀,压力计算结果与实验结果偏差在5.5%之内,可为深入认识炸药爆轰反应区的动态力学行为提供理论支撑。

关键词: 超压爆轰, 六硝基六氮杂异伍兹烷基含铝炸药, 反应区, 阻抗匹配, 超压爆轰状态方程

Abstract:

The overdriven detonation states of high-energy explosives under the conditions of charge structure,different detonation methods and other strong load excitation can improve the explosive energy release ability. The state of ODD products is accurately characterized to address the core problem of the new hexanitrohexaazaisowurtzitane (CL-20)-based aluminized explosives under the action of overdriven detonation (ODD).To this end,the particle velocity of CL-20-based aluminized explosives under ODD conditions is tested based on the impedance matching method,the interfacial pressures of the shock wave in different media are calculated,and the characteristic parameters of detonation reaction zone of CL-20-based aluminized explosives are determined.The parameters of JWL+γ equation of state for the detonation products are calibrated by combining with the real-arithmetic genetic algorithm (RA-GA),and the effects of the equations of state of the different detonation products on the overdriven Hugoniot pressure are revealed.The results show that,when the content of aluminium powder is 0%-30%,the duration of overdriven detonation reaction zone and the width of detonation reaction zone of CL-20-based aluminium-containing explosives are directly proportional to the content of aluminium powder,and the width of the reaction zone is increased by 1.97-2.7 times compared with that of the reaction zone without added aluminium powder,while the efficiency of energy release of detonation reaction zone is inversely proportional to the content of aluminium powder.When the content of aluminum powder is the same,the energy release efficiency of the detonation reaction zone is decreased by 25% after adding AP.Compared with the existing overdriven detonation equation of state,JWL+γ equation of state can better fit the overpressure Hugoniot parameters and the isentropic expansion of C-J state,and the deviation of the calculated pressure results from the experimental results is less than 5.5%,which can provide theoretical support for thoroughly understanding of the dynamic mechanical behaviour of explosive detonation reaction zone.

Key words: overdriven detonation, hexanitrohexaazaisowurtzitane-based aluminized explosive, reaction zone, impedance matching, equation of state for overdriven detonation

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