摘要
采用二维轴对称网格、VOF方法和动网格技术对重力作用下半球头圆柱体垂直穿越气液界面过程的气液两相流和圆柱体运动耦合的问题进行了数值模拟,其中圆柱体运动速度由实验数据拟合而得。得到了圆柱体入水过程空泡的形成和闭合等气液界面的变化现象,以及圆柱体所受冲击载荷的变化过程。结果表明:圆柱入水的数值模拟结果与相应实验结果吻合较好;面闭合、向下喷射对圆柱体所受入水冲击载荷有较大的影响。
2D axisymmetric grid, volume of fluid method （VOF） and dynamics mesh technique （DMT） were used to simulate the gas-liquid multiphase and the cylinder body motion during the hemisphere-cylinder body vertically crossing the gas-liquid interface into water based on gravity effect. The velocity of the cylinder body was obtained by the experimental results. The numerical gas-liquid interface deformation such as cavity formation, closure was also obtained. Besides, the entry impact due to water entry was given. Computational results were in good agreement with the experimental data. The surface closure and down-jet had a significant effect on the entry impact.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2013年第10期1856-1859,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51176145)
关键词
数值模拟
VOF方法
动网格
气液界面
numericM simulation
VOF method
dynamics mesh
gas-liquid interface
