基于数值仿真的球体垂直入水空泡演化过程研究
Numerical Investigation on the Evolution of Vertical Water-entry Cavity of a Sphere
张晨星 1谷立祥 1权晓波 1魏海鹏 1程少华1
作者信息
- 1. 北京宇航系统工程研究所,北京,100076
- 折叠
摘要
为研究球体垂直入水空泡的演化过程,基于N-S方程、VOF多相流模型及动网格技术,对球体的垂直入水过程开展了数值仿真模拟并进行分析.球体入水初期受到较强的冲击载荷并产生喷溅,球体入水后会产生和大气相连的入水空泡,空泡形成之后,依次经历发展、闭合以及溃灭等演化阶段,空泡受到的周围流体压力是空泡发生深度闭合的主要原因,空泡在闭合后会产生上下两股高速射流.结果表明:数值计算得到的球体垂直入水空泡形态和试验结果吻合良好,验证了仿真的准确性.
Abstract
In order to investigate the evolution of vertical water-entry cavity of a sphere,a numerical simulation for modeling the vertical water-entry of a sphere was performed,which is based on Navier-Stokes equations,volume of fluid model and dynamic mesh.It showed that numerical results compared favorably with the experimental results,which verified the accuracy of the simulation method.In addition,during the early period of the water entry,there was a high impact load on the sphere and a splash rose from the surface,and then a water-entry cavity which was open to the atmosphere formed.The cavity experienced development,closure and collapse periods after its formation.Pressure acting on the cavity was the main cause of the deep closure,and high speed up-jet and down-jet appeared after the closure.
关键词
球体/入水/空泡/动网格Key words
sphere/water-entry/cavity/dynamic mesh引用本文复制引用
出版年
2024
NETL
NSTL
万方数据