超空泡航行体运动过程尾部振荡流场试验研究  

Experimental study on the trailing oscillation flow structure in the supercavitating vehicle motion

作　　者：时素果[1] 王亚东[1] 刘乐华[1] 杨晓光[1] SHI Su-guo;WANG Ya-dong;LIU Le-hua;YANG Xiao-guang(Beijing Electro-Mechanical Engineering Institute, Beijing 100074, China)

机构地区：[1]北京机电工程研究所

出　　处：《船舶力学》2019年第8期917-925,共9页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目（No.11602260）

摘　　要：为了揭示超空泡航行体运动过程尾部振荡机理,文章采用试验的方法对超空泡航行体自由航行过程进行了研究。试验在水池中开展,采用高速摄影观察自由航行过程超空泡形态演化规律,采用压力传感器测量航行体表面压力,采用内测装置测量了航行体运动参数,获得了超空泡航行体运动过程空泡形态、压力和运动参数变化规律。试验结果表明,在航行体运动过程中,会出现尾部上下周期撞击空泡壁振荡现象,即为尾拍效应,表现为航行体撞击空泡壁瞬间,会形成非定常气液混合区域,相反侧则出现空泡透明区域。同时,稳定空泡内压力并非一定值,泡内压力和泡内空化数均在一定范围内波动,在尾部撞击空泡壁一侧,压力不断增大,出现压力高峰,相反侧则与稳定空泡内压力基本一致。In order to reveal the mechanism of the trailing oscillation in the supercavitating vehicles motion, the unsteady flow of the supercavitating vehicle free motion is investigated by experimental methods. The experiment is applied in the pool, a high-speed video camera is used to visualize the cavity shape, the pressure sensor is employed to measure the surface pressure of the vehicle, the motion parameters of the vehicle is measured by the inside measurement, and the caivity shape, pressure and the motion parameters are acquired of the supercavitating vehicle motion. The experimental results show that the phenomenon of the vehicle trailing upper and lower periodic impacting to the cavity occurs, it is called the tail-slaps effect. The tail-slaps are shown as here, there occurs vapor-gas-liquid region in the side of the vehicle impact to the cavity, a transparent vapor area appears in the other side of the vehicle. The peresure in the cavity is not a steady value, the pressure and the cavitation number in the cavity are fluctuated in the range, the pressure increases in the side of the vehicle impacting to the cavity, and then the peak pressure occurs, the pressure in the other side is the same as the stable cavity.

关 键 词：超空泡 航行体 尾拍 压力峰值 试验研究 

分 类 号：O352[理学—流体力学] TV131[理学—力学]