柱状含铝炸药水下爆炸近场的特征线法研究

李晓杰; 杨晨琛; 闫鸿浩; 王小红; 王宇新; 张程娇

doi:10.11883/bzycj-2017-0412

柱状含铝炸药水下爆炸近场的特征线法研究

doi: 10.11883/bzycj-2017-0412

大连理工大学工程力学系工业装备结构分析国家重点实验室, 辽宁大连 116023

基金项目:

国家自然科学基金项目 11272081

国家自然科学基金项目 11672067

详细信息

作者简介:
李晓杰(1963-), 男, 博士, 教授, 博士生导师, dalian03@qq.com

中图分类号: O381
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- 文章访问数: 6869
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- 被引次数: 0
出版历程
- 收稿日期: 2017-04-12
- 修回日期: 2018-01-31
- 刊出日期: 2019-02-05

Numerical study of near-field underwater explosion of cylindrical aluminized explosive by the method of characteristics

State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, Liaoning, China

摘要

摘要: 基于之前提出的一种含熵变项的特征线法，通过控制非等熵流中的能量释放来刻画铝粉燃烧的影响，结合简单Chapman-Jouguet模型和JWL-Miller状态方程，计算了柱形含铝炸药水下爆炸的近场参数。对比模拟结果与实验数据，发现这种特征线法可以较好地预测近场冲击波的传播迹线、爆轰产物的膨胀轨迹以及内部压缩波的反射过程。结果表明，这种特征线法可用于含铝炸药水下爆炸的近场计算，进一步可用于评估含铝炸药性能或计算水下能量输出。
- 含铝装药 /
- 水下爆炸 /
- 非等熵流 /
- 特征线法
Abstract: Based on the previously proposed method of characteristics containing an entropy variate, the non-ideal effect of aluminum combustion is portrayed by controlling the energy release in non-isentropic flow. Combined with a simple Chapman-Jouguet model and a JWL-Miller equation of state, it is obtained the near-field parameters for the underwater explosion of the cylindrical aluminized explosive. Comparing the simulation results with the experimental data, it is found that this method can give a good prediction for the propagation of shock wave and the bubble expansion of detonation products as well as the reflection of internal compression wave. The results show that this method can be applied to the near-field calculation of underwater explosion of aluminum explosive, and even the evaluation of explosive performance or the estimation of underwater energy output.
- aluminized explosive /
- underwater explosion /
- non-isentropic flow /
- method of characteristics

HTML全文

图 1 柱状含铝炸药水下爆炸定常模型

Figure 1. The steady model for underwater explosion of cylindrical aluminized explosive

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图 2 水下冲击波的传播迹线以及爆轰产物的气泡膨胀

Figure 2. Trajectories of underwater shock wave and bubble expansion of detonation product

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图 3 含铝炸药在不同装药直径时的水气界面迹线和已反应铝分数

Figure 3. Bubble expansion and reacted Al fraction of aluminized explosive with different charge diameters

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图 4 轴线、水气边界、冲击波3处压力的相对增幅

Figure 4. Relative increment of the pressure at axis, interface and shockwave

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图 5 特征线网格上的近场冲击波与爆轰产物膨胀的关系

Figure 5. Connections between near-field shock and detonation products expansion on characteristic net

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