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兵工学报 ›› 2014, Vol. 35 ›› Issue (4): 468-474.doi: 10.3969/j.issn.1000-1093.2014.04.006

• 论文 • 上一篇    下一篇

水下爆炸两气泡相互作用的数值计算研究

李健1, 荣吉利2, 林贤坤3, 项大林2   

  1. (1.广西科技大学 汽车与交通学院, 广西 柳州 545006; 2.北京理工大学 宇航学院, 北京 100081;3.广西汽车零部件与整车技术重点实验室, 广西 柳州 545006)
  • 收稿日期:2013-06-26 修回日期:2013-06-26 上线日期:2014-05-26
  • 通讯作者: 李健 E-mail:lijian327@gmail.com
  • 作者简介:李健(1980—),男,教授
  • 基金资助:
    国家自然科学基金项目(51209042、11272057)

Numerical Study of Interaction of Two Bubbles in Underwater Explosion

LI Jian1, RONG Ji-li2, LIN Xian-kun3, XIANG Da-lin2   

  1. (1.Automotive and Transportation Engineering Institute,Guangxi University of Science and Technology, Liuzhou 545006,Guangxi,China;2.School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081,China;3.Guangxi Key Laboratory of Automobile Components and Vehicle Technology,Liuzhou 545006,Guangxi,China)
  • Received:2013-06-26 Revised:2013-06-26 Online:2014-05-26
  • Contact: LI Jian E-mail:lijian327@gmail.com

摘要: 基于MSC.DYTRAN有限元软件中的EXINIT及EXFLOW2接口分别开发、定义了三维流场静水压力与边界条件的子程序;以Frost提出的气泡体积加速度模型为基础,确定了水下爆炸气泡脉动的初始条件,对水下爆炸单一气泡脉动过程进行了数值模拟;通过将气泡脉动半径、周期与经验公式对比,验证子程序开发的正确性与计算结果的准确性。以单一气泡运动模型为基础,建立水下爆炸两气泡运动的计算模型,研究两气泡水平距离、竖直距离及初始角度等参数对气泡运动与融合、射流角度、射流速度的影响规律。气泡运动建模思路、计算方法与结果对水下爆炸两气泡运动特性的研究具有一定参考价值。

关键词: 爆炸力学, 水下爆炸, 气泡脉动, 两气泡, 射流, 数值模拟

Abstract: Subroutines which define the hydrostatic pressure and boundary conditions of the three-dimension fluid field are developed based on MSC.DYTRAN software. The volume-acceleration model is introduced to determine the initial condition of bubble pulsation in underwater explosion. The numerical simulations are compared with the results of validated experimental data. The calculated results of pulsation radius and period of single bubble are well agreement with the experimental results. The interaction of two bubbles is studied systematically, and the relative law of that the dynamic behaviors of bubbles are closely related distance and initial angle is summarized. The bubble model and numerical simulation arevaluable to correlative theory research and engineering calculation.

Key words: explosion mechanics, underwater explosion, bubble pulsation, two bubbles, jet, numerical simulation

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