球体垂直入水空泡实验研究  

Experimental investigation on vertical water-entry cavity of sphere

作　　者：马庆鹏[1] 何春涛[2] 王聪[1] 魏英杰[1] 路中磊 孙健[1] 

机构地区：[1]哈尔滨工业大学航天学院,黑龙江哈尔滨150001 [2]北京机械设备研究所,北京100854

出　　处：《爆炸与冲击》2014年第2期174-180,共7页Explosion and Shock Waves

基　　金：中央高校基本科研业务费专项项目(HIT.NSRIF.201159)

摘　　要：针对球体垂直入水问题开展了实验研究,分析了入水空泡的形成、发展、闭合及溃灭过程。通过开展不同初始入水速度及表面沾湿状态的实验研究,得到了入水速度及表面沾湿状态对球体入水空泡流场的影响,同时分析了球体在垂直入水过程中的位移、速度、加速度以及阻力因数。结果表明,球体在水下的运动参数具有较强的非线性特性,速度较高、入水空泡深闭合的条件下,球体的运动参数及阻力因数曲线具有明显的波动。Experimental investigations and analysis were carried out on the vertical water-entry of the spheres. The development process of the cavities induced by the vertical water-entry of the spheres was discussed including the formation, open, closure and collapse of the cavities. The influences of the water-entry velocities and surface conditions of the spheres on the cavities were experimentally obtained. And the displacements, velocities, accelerations and drag coefficients of the spheres during the water entry were analyzed. The investigated results show that the motion parameters of the spheres present highly nonlinear characteristics. And there are obvious fluctuations of the motion parameters and the drag coefficients during the closed-cavity phase if the water-entry velocities are high.

关 键 词：流体力学 入水空泡 入水 球体 运动参数 

分 类 号：O351.2[理学—流体力学]