Reverse motion characteristics of water-vapor mixture in supercavitating flow around a hydrofoil  

作　　者：李向宾 李楠 王国玉 张敏弟 

机构地区：[1]School of Nuclear Science and Engineering,Beijing Key Laboratory of Passive Safety Technology for Nuclear Energy,North China Electric Power University [2]School of Mechanics and Vehicle Engineering,Beijing Institute of Technology

出　　处：《Journal of Hydrodynamics》2016年第5期757-766,共10页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Natural Science Foun-dation of China(Grant No.50679001)

摘　　要：The supercavitation has attracted a growing interest because of its potential for high-speed vehicle maneuvering and drag reduction. To better understand the reverse flow characteristics of a water-vapor mixture in supercavitating flows around a hydrofoil, a numerical simulation is conducted using a unified supercavitation model, which combines a modified RNG k-~ turbulence model and a cavitation one. By comparing the related experimental results, the reverse motion of the water-vapor mixture is found in the cavitation area in all supercavitation stages. The inverse pressure gradient leads to reverse pressure fluctuations in the cavity, followed by the reverse motion of the water-vapor two-phase interface. Compared with the water-vapor mixture area at the back of the cavity, the pressure in the vapor area is inversely and slowly reduced, a higher-pressure gradient occurs near the cavity boundary.The supercavitation has attracted a growing interest because of its potential for high-speed vehicle maneuvering and drag reduction. To better understand the reverse flow characteristics of a water-vapor mixture in supercavitating flows around a hydrofoil, a numerical simulation is conducted using a unified supercavitation model, which combines a modified RNG k-~ turbulence model and a cavitation one. By comparing the related experimental results, the reverse motion of the water-vapor mixture is found in the cavitation area in all supercavitation stages. The inverse pressure gradient leads to reverse pressure fluctuations in the cavity, followed by the reverse motion of the water-vapor two-phase interface. Compared with the water-vapor mixture area at the back of the cavity, the pressure in the vapor area is inversely and slowly reduced, a higher-pressure gradient occurs near the cavity boundary.

关 键 词：SUPERCAVITATION water-vapor interface reverse motion pressure distribution numerical simulation 

分 类 号：O35[理学—流体力学]