CHINESE JOURNAL OF ENERGETIC MATERIALS
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2,4-二硝基苯甲醚基钝感熔铸含铝炸药的冲击起爆特性
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北京理工大学爆炸科学与技术国家重点实验室, 北京 100081

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国家自然科学基金(11772056,U1630113)


Shock Initiation Characteristic of Insensitive DNAN-based Aluminized Melt-cast Explosive
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State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

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    摘要:

    为了探究钝感熔铸含铝炸药的冲击起爆特性,建立化学爆炸加载一维拉格朗日锰铜压阻测试系统,获得了不同加载压力下一典型2,4-二硝基苯甲醚(DNAN)基钝感熔铸含铝炸药的冲击起爆过程压力成长历史。利用熔铸含铝Duan-Zhang-Kim(DZK)细观反应速率模型,确定了该钝感含铝炸药的反应速率模型参数,并对其冲击起爆过程进行了数值模拟研究。结果表明在钝感熔铸含铝炸药的冲击起爆过程中,波阵面附近炸药的反应速率和反应程度均较低,而随着热点点火反应的进行以及化学反应的不断累积,炸药的波后化学反应速率不断增加,并在一段时间后到达峰值。当加载压力越高时,钝感熔铸含铝炸药内部的爆轰成长速率越快。同时,与粒子速度成长历史相比,压力成长历史包含更多的反应速率变化信息,更适用于反应速率模型的验证以及炸药反应流模型参数的确定。

    Abstract:

    To investigate the shock initiation characteristics of the insensitive aluminized melt-cast explosives, a one-dimensional Lagrangian test system was established with the manganin piezoresistive pressure gauges and the loading technique of chemical explosion. The shock initiation process of an aluminized DNAN-based melt-cast explosive was measured, and the growth histories of pressure were obtained under different loading pressures. By virtue of the mesoscopic model of reaction rate of the aluminized melt-cast Duan-Zhang-Kim (DZK) , the parameters of the aluminized explosive were determined and then the shock initiation process was simulated numerically. It is found that the higher the loading pressure is, the faster the detonation grows inside the aluminized explosive. In the shock initiation of the aluminized melt-cast explosive, the reaction degree and reaction rate are low near the leading wave front. However, the reaction rate of explosive after wave increases continuously and reaches the peak value in a while with the ignition reaction and the accumulation of chemical reaction Furthermore, compared with the growth history of particle velocity, those of pressure involve more detail of the growth of reaction rate, which are more suitable to be used in validating the reaction rate models and determining the parameters of reaction flow models.

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李淑睿,段卓平,高天雨,等.2,4-二硝基苯甲醚基钝感熔铸含铝炸药的冲击起爆特性[J].含能材料,2021,29(2):88-95. DOI:10.11943/CJEM2020238.
LI Shu-rui, DUAN Zhuo-ping, GAO Tian-yu, et al. Shock Initiation Characteristic of Insensitive DNAN-based Aluminized Melt-cast Explosive[J]. Chinese Journal of Energetic Materials, 2021, 29(2):88-95. DOI:10.11943/CJEM2020238.

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历史
  • 收稿日期: 2020-08-27
  • 最后修改日期: 2020-11-27
  • 录用日期: 2020-10-28
  • 在线发布日期: 2020-11-26
  • 出版日期: 2021-02-25