水下气体涡环生成及演化数值模拟  

Numerical Simulation of Generation and Evolution of Underwater Gas Vortex Ring

作　　者：余留芳 梅宗书 柴明明 刘江海 张北辰 陆晓霞 YU Liufang;MEI Zongshu;CHAI Mingming;LIU Jianghai;ZHANG Beichen;LU Xiaoxia(Chemical Defense Institute,Academy of Military Sciences,Beijing 102205,China)

机构地区：[1]军事科学院防化研究院,北京102205

出　　处：《防化研究》2025年第1期56-63,共8页CBRN DEFENSE

摘　　要：为探究水下气体涡环生成及演化的物理机制,运用流体体积(Volume of Fluid,VOF)法两相流模型对涡环生成条件和发展过程进行了模拟,并开展了水下气体涡环发生实验,对比验证了数值模拟结果的准确性。研究表明,水下气体涡环生成及发展需要经历夹断、射流、拉伸和变形4个阶段。通过实验及数值结果数据拟合得到形成有效涡环需要满足的通气压强、通气时间等参数范围,揭示了涡环的结构特征和动力学特性满足Fr相似性准则以及涡量、环量随时间变化的趋势,可为探究水下气体涡环生成及演化规律提供理论借鉴。In order to explore the physical mechanism of the generation and evolution of underwater gas vortex ring,the volume of fluid(VOF) two-phase flow model was used to simulate the generation conditions and development process of the vortex ring.Experiments was conducted on underwater gas vortex ring generation and the experimental results were compared with the bubble morphology of high-speed photography to verify the validity of the numerical calculation.The study showed that underwater gas vortex ring generation and development needed to go through four stages:pinch-off,jet-flow,stretching and deformation.Through the experiments and numerical data fitting,the range of parameters such as ventilation pressure and time that needed to be met to form an effective vortex ring were got,and the structural characteristics and dynamic behaviors of the vortex ring to meet the Fr similarity criterion were revealed,as well as the trend of vortex volume and ring volume change over time.The findings were expected to provide theoretical reference for investigating the generation and evolution law of vortex ring in underwater gas.

关 键 词：水下气体涡环 演化 数值模拟 动力学特性 

分 类 号：TV139.2[水利工程—水力学及河流动力学]