| 赵家兴,刘凇含,姜林.水雾对爆炸冲击波的衰减机理研究[J].计算力学学报,2025,42(1):8~18 |
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| 水雾对爆炸冲击波的衰减机理研究 |
| Investigation on blast mitigation mechanism by water mist |
| 投稿时间：2023-08-22 修订日期：2023-10-20 |
| DOI：10.7511/jslx20230822002 |
| 中文关键词: 水雾 冲击波 爆炸衰减 欧拉-拉格朗日方法 能量耗散 |
| 英文关键词:water mist blast wave blast mitigation Euler-Lagrange method dissipation of energy |
| 基金项目:国家重点研发计划(2020YFC1522800);国家自然科学基金(52176114;52111530091)资助项目. |
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| 摘要点击次数: 14 |
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| 中文摘要: |
| 旨在探究水雾对爆炸冲击波的衰减机理以及水雾中冲击波能量和动量的耗散过程。为此,基于欧拉-拉格朗日方法对水雾与爆炸冲击波的相互作用过程进行了三维数值模拟,并分析了爆炸冲击波在水雾内的传播特征、液滴与爆炸释放的能量之间的传热、传质和动量传递过程。建立的数值模型考虑了气相与液滴相之间的质量、动量和能量传递以及液滴雾化,并首次考虑了液滴的尺寸分布。研究结果表明,水雾能够有效阻挡爆炸释放的热量。当冲击波通过空气-水雾交界面时,会发生反射和透射现象。雾滴通过动量提取、蒸发和对流换热吸收透射冲击波的能量,致使冲击波受到削弱。空气-水雾交界面是冲击波与水雾之间动量和能量传递效率最高的位置。由于冲击波的衰减,波阵面后的气流速度和温度会不断降低,从而导致冲击波与水雾之间的动量和能量传递效率逐渐降低。 |
| 英文摘要: |
| This study aims to investigate the attenuation mechanism of water mist on blast waves and the dissipation process of energy and momentum in the water mist.To achieve this goal,a three-dimensional numerical simulation of the interaction between water mist and a blast wave is carried out based on Euler-Lagrange method.The propagation characteristics of the blast wave in the water mist,as well as the heat transfer,mass transfer,and momentum transfer between droplets and the energy released by the explosion,were analyzed.The established numerical model takes into account the mass,momentum,and energy transfer between the gas phase and the droplet phase,as well as droplet atomization,and for the first time considers the size distribution of the droplets.The research results demonstrate that water mist can effectively block the heat released by explosions.When the blast waves pass through the air-water mist interface,both reflection and transmission phenomena occur.The water mist absorbs energy through processes such as momentum extraction,evaporation,and convective heat transfer by droplets,resulting in the weakening of the blast waves.The air-water mist interface is the location with the highest efficiency of momentum and energy transfers between blast waves and water mist.Due to the attenuation of blast waves,the velocity and temperature of the airflow behind the shock front gradually decrease,leading to a gradual reduction in the efficiency of momentum and energy transfers between the blast waves and water mist. |
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