弹道学报2025，Vol.37Issue(3)：85-91,7.DOI:10.12115/ddxb.2024.07004
斜截头圆柱入水空泡及流动特性计算研究
Numerical Study on Cavity Dynamics and Flow Characteristics During Water Entry of Truncated Cone-shaped Cylinder
摘要
Abstract
At this stage,transmedia weapons encounter asymmetric hydrodynamic challenges in complex operational environments,involving strong nonlinear processes such as asymmetric cavity evolution and free-liquid-surface deformation.For the asymmetric-object transmedia hydrodynamic properties,the three-dimensional numerical model was established.The CFD method was used to simulate water entry of truncated cone-shaped cylinder,including head cavity formation,cylinder rotation and tail cavity generation.The effects of different water-entry angles on the cavity evolution and the multiphase flow field were studied in detail.The accuracy of the proposed numerical model was verified by comparing the numerical calculation results with the experimental data.The numerical results show that the truncated cone-shaped cylinder entering water generates pitching moment due to head asymmetry,leading to the counterclockwise rotation of the cylinder and the formation of an asymmetric cavity during the rotation process.Subsequently,the tail of the cylinder hits the cavity wall to generate reaction force,which affects the rotation rate of the cylinder,and the cavity tends to be more asymmetric.Void closure patterns and pressure characteristics of cylinder vary with the water entry angles,especially during the initial water-entry subjected to a large difference in pressure.The cylinder during water entery is affected by collisions,tail impacts and closure dynamics,causing changes of high-pressure and high-velocity regions.Pressure and velocity fields change with the change of water-entry angles.关键词
斜截头圆柱/计算流体力学/空泡演化/入水试验Key words
truncated cone-shaped cylinder/CFD/cavity evolution/water-entry experiment分类
军事科技引用本文复制引用
赵越玟,唐颀,郑伟,漆超,王旭,杨崇湘,吕续舰..斜截头圆柱入水空泡及流动特性计算研究[J].弹道学报,2025,37(3):85-91,7.基金项目
装备重大基础项目(909120703) （909120703）
瞬态冲击技术重点实验室基金(JCKY2023209C001) （JCKY2023209C001）
