Study on the factors influencing the interaction and coalescence of shock waves from multiple explosion sources in free field

IF 1.7 4区工程技术 Q3 MECHANICS

Shock Waves Pub Date : 2022-12-28 DOI:10.1007/s00193-022-01111-4

S. Y. Wang, J. L. Qiu, Y. W. Wang, J. W. Jiang

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Abstract

The interaction and coalescence of shock waves originating from multiple explosion sources were studied using numerical simulations and theoretical analysis. The effects of the mass distribution, layout, and quantity of explosion sources were considered, and an engineering calculation model for shock wave parameters at the focus center was established. The results show that the peak overpressure at the focus center is significantly changed only when the mass ratio of the two explosion sources increases beyond two. Overall, the peak overpressure at the focus center decreases with the increase in mass ratio. The focus effect of multiple explosion sources is the greatest when the sources are uniformly distributed on a circle. When the number of explosion sources is less than four, the peak overpressure and specific impulse at the focus center increase with the increase of the number of explosion sources. Increasing the number of explosion sources from one to four results in an increase in the peak overpressure by a factor of 0.73–5.23 and an increase in the specific impulse gain by a factor of 1.59–4.71. The results from simulations and experiments verify the validity of the model used to characterize multiple explosion sources.

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自由场多爆炸源激波相互作用与聚并的影响因素研究

采用数值模拟和理论分析相结合的方法研究了多个爆炸源产生的激波相互作用和聚并。考虑了爆炸源的质量分布、布置和数量等因素的影响，建立了焦点中心冲击波参数的工程计算模型。结果表明，只有当两个爆炸源的质量比大于2时，焦点中心的峰值超压才会发生显著变化。总体而言，焦点中心峰值超压随质量比的增大而减小。当多个爆炸源均匀分布在一个圆上时，多个爆炸源的聚焦效应最大。当爆炸源数量小于4个时，随着爆炸源数量的增加，焦点中心的峰值超压和比冲增大。将爆炸源数量从1个增加到4个，峰值超压增加了0.73-5.23倍，比脉冲增益增加了1.59-4.71倍。仿真和实验结果验证了该模型用于多爆炸源特征描述的有效性。

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来源期刊

Shock Waves 物理-力学

CiteScore

4.10

自引率

9.10%

发文量

审稿时长

17.4 months

期刊介绍： Shock Waves provides a forum for presenting and discussing new results in all fields where shock and detonation phenomena play a role. The journal addresses physicists, engineers and applied mathematicians working on theoretical, experimental or numerical issues, including diagnostics and flow visualization. The research fields considered include, but are not limited to, aero- and gas dynamics, acoustics, physical chemistry, condensed matter and plasmas, with applications encompassing materials sciences, space sciences, geosciences, life sciences and medicine. Of particular interest are contributions which provide insights into fundamental aspects of the techniques that are relevant to more than one specific research community. The journal publishes scholarly research papers, invited review articles and short notes, as well as comments on papers already published in this journal. Occasionally concise meeting reports of interest to the Shock Waves community are published.