波浪模拟及其对水下航行体出水过程影响

权晓波, 孔德才, 李岩

北京宇航系统工程研究所



摘要:

为了研究波浪对水下航行体出水过程的影响,将二阶Stokes波的波面运动速度耦合到入射边界条件中,得到了与理论值吻合良好、精度较高的非定常数值波浪;研究了五级海情条件下,水下航行体模型水下垂直发射时波浪对其流场、力学特性等的影响.结果表明,水下航行体近水面时,受波浪引起的旋涡的诱导作用,航行体两侧附体旋涡位置、尺寸等差别较大,航行体受到绕z轴逆时针方向的力矩作用而向左侧偏转,水下航行体尾部完全出水后偏移量为1 m左右.该研究结果为真实海情的水下航行体技术奠定了理论基础.

关键词:  水下航行体  出水过程  波浪  数值模拟

DOI：10.11918/j.issn.0367-6234.2011.03.029

分类号:U661.1

基金项目:



Wave simulation and its effects on the exceeding water process of the underwater vehicle

QUAN Xiao-bo, KONG De-cai, LI Yan

Beijing Institute of Astronautical System Engineering,100076 Beijing,China

Abstract:

To study the effects of wave on exceeding water process of underwater vehicle,the wave surface velocity of the second-order Stokes wave was coupled into the incident boundary condition,thus the unsteady numerical wave was obtained,which agreed well with the theoretical value and had high accuracy.The effects of wave on the flow field and dynamic characteristic of the underwater vehicle model when it was launched vertically under the water were investigated under fifth wave level.The results show that when the vehicle approaches the water surface,due to the induced effects of the vortices caused by the wave,the position and the size of the attached vortices at two sides of the vehicle vary significantly.The vehicle body deflects in the left under the effect of the moment rotated around the z axis in the anti-clockwise direction,so that the offset of the vehicle afterbody is about one meter when the vehicle exceeds from the water completely.

Key words:  underwater vehicle  exceeding water process  wave  numerical simulation