摘要
基于边界积分法建立水下爆炸气泡与自由面耦合数值模型;并开发相应的计算程序,计算值与实验值符合较好.从气泡与自由面相互作用的基本现象入手,运用开发的程序系统地研究了近自由面水下爆炸气泡的动态特性,包括近自由面气泡的环状回弹及自由面的水冢现象;研究距离参数、浮力参数以及强度参数等特征参数与自由面Bjerknes效应之间的关系,总结相关规律,近自由面气泡的动态特性与这些特征参数有密切的关系.并在研究过程中,讨论了基于Kelvin-impulse理论的Blake准则的适用范围,并解释了Blake准则的失效的原因.旨在为相关的近自由面水下爆炸气泡动态特性研究提供参考.
The numerical model of underwater explosion bubble coupling with free surface is created based on boundary integral method and the corresponding program is exploited to get the calculated result which presents satisfactory precision with experiment data. From the basic phenomenon of the interaction between bubble and free surface, the dynamic behavior of bubble near free surface is studied systematically employing the exploited program including the ring rebound of bubble near free surface and spike of free surface as well as the relation between distance parameter buoyancy parameter strength parameter and Bjerknes effect near free surface to summarize relative laws that the dynamic behavior near free surface has close relation with these characteristic parameters. In the process of study, scope of applicability of Blake rule on the basis of Kelvin-impulse theory is discussed and the reason for inactivation of Blake rule is interpreted to present references to research on dynamic behavior of underwater explosion bubble near free surface.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第1期339-353,共15页
Acta Physica Sinica
基金
国家自然科学基金(批准号:50779007)资助的课题~~
关键词
气泡
自由面
环状
水冢
bubble, free surface, ring, spike of free surface
