CHINESE JOURNAL OF ENERGETIC MATERIALS
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云雾区形貌对云雾爆轰超压毁伤威力的影响
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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

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国家自然科学基金(U2341243、12122203)


Influence of Cloud Morphology on The Cloud Detonation Overpressure Damage Power
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State Key Laboratory of Explosion Science and Safety Protection,Beijing Institute of Technology, Beijing 100081,China

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    摘要:

    云爆装置通常形成近似圆柱体形貌的燃料空气混合云雾区,而与装药结构密切相关的云雾区形貌强烈影响其爆轰超压场的时空演化规律,进而对爆轰超压毁伤威力产生显著影响。为了探究云雾区的形貌效应,采用圆柱体云雾区理想爆轰数值计算方法,分析了其爆轰过程中复杂的波的动力学过程,研究了爆轰超压场的分布及演化,建立了中心切面径向远场超压峰值随比例距离的衰减相似律,得到了爆轰超压毁伤半径与云雾区形貌参数(半径/高度)的依赖关系。结果表明,受云雾区内部复杂爆轰过程影响,其径向远场超压场存在明显双峰现象;双峰追赶导致爆轰超压峰值随比例距离变化曲线存在小幅特征突变现象,且形貌参数越大,该突变位置距起爆点越近;当形貌参数在2~4.5范围内时,其爆轰远场超压峰值随比例距离的衰减规律满足同一多项式相似律,基于该相似律预测得到的超压毁伤半径最大误差不超过8%;而当形貌参数在0.5~2范围内时,其超压毁伤半径随形貌参数的增大而减小。

    Abstract:

    The cloud detonation devices typically form a fuel air mixture cloud with an approximate cylindrical shape. The morphological parameters of the cloud closely related to the charge structure strongly affect the spatiotemporal evolution law of its detonation overpressure field, which in turn has a significant impact on its detonation overpressure damage power. In order to explore the morphological effects of cloud, through the numerical calculation method for ideal detonation in cylindrical cloud, the complex dynamic process of waves during its detonation process was analyzed. The evolution and distribution law of the cloud detonation overpressure field was investigated. A similar decay law of the radial far-field peak overpressure with scaled distance was established.The dependence relationship between the detonation overpressure damage radius and the morphological parameters (ratio of radius to height) of the cloud was provided. The research results indicated that there was a significant bimodal phenomenon in the radial far-field overpressure field, due to the complex detonation process inside the cylindrical cloud. The pursuit of two peaks resulted in a characteristic mutation phenomenon of small amplitude and small range in the variation curve of the peak overpressure of detonation with scaled distance, and the larger the morphological parameter, the closer the certain position was to the detonation point.Furthermore, when the morphological parameters within the range of 2-4.5, the decay law of the detonation far-field peak overpressure with scaled distance satisfied the same similarity law. The maximum error of the overpressure damage radius obtained based on that similarity law was less than 8%. When the morphological parameters within the range of 0.5-2, the detonation overpressure damage radius decreased with the increase of morphological parameters.

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引用本文

王溪濛,薛琨. 云雾区形貌对云雾爆轰超压毁伤威力的影响[J]. 含能材料,DOI:10.11943/CJEM2024202.

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  • 收稿日期: 2024-07-29
  • 最后修改日期: 2024-10-29
  • 录用日期: 2024-10-24
  • 在线发布日期: 2024-10-25
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