EXPERIMENTAL AND NUMERICAL INVESTIGATION OF FREE SURFACE VORTEX

作     者：LI Hai-feng CHEN Hong-xun MA Zheng ZHOU Yi LI Hai-feng, CHEN Hong-xun Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China,MA Zheng China Ship Scientific Research Center, Wuxi 214082, China ZHOU Yi Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China

作者机构：Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China China Ship Scientific Research Center Wuxi 214082 China 

出 版 物：《Journal of Hydrodynamics》 (水动力学研究与进展B辑（英文版）)

年 卷 期：2008年第20卷第4期

页      面：485-491页

核心收录：

学科分类：080103[工学-流体力学] 08[工学] 080104[工学-工程力学] 081502[工学-水力学及河流动力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the National Natural Science Foundation of China (Grant No. 10772108) the ShanghaiLeading Academic Discipline Project (Grant No. Y0103) 

主　　题：free surface vortex Particle Image Velocimetry (PIV) numerical simulation rankine vortex 

摘      要：An experimental model was set up to investigate the formation and evolution of the free surface vortex. A Particle Image Velocimetry （PIV） was used to measure the free surface vortex flow field at different development stages. Flow visualization was used to locate the vortex position and find its structure. Empirical formulas about the critical submergence and the whole field structure were obtained. It is found that the tangential velocity distribution is similar to that of the Rankine vortex and the radial velocity changes little in the vortex functional scope. Vortex starts from the free surface and gradually intensifies to air entrainment vortex. The vortex core moves during the formation and evolution of the free surface vortex. Based on the experimental model, the vortex position and structure were predicted by numerical simulation combined with a vortex model and compared with that of the experiments, which shows satisfactory agreement.