采用DPIV技术研究浅水平板岛屿尾流  

Research on shallow plate wake using DPIV

作　　者：梁东方[1] 李玉 陈嘉范[1] 

机构地区：[1]清华大学水利水电工程系,北京100084

出　　处：《水科学进展》2004年第6期711-716,共6页Advances in Water Science

基　　金：国家自然科学基金资助项目(50079010)~~

摘　　要：人们对于尾流的研究大都针对绕流体在展向非常长的情形,但是在天然环境和水利工程中出现的多为水深相对很浅的流动。由于槽底和自由水面的限制,浅水域中的尾流有着与深水尾流不同的流动规律。采用数字粒子图像测速(DPIV)技术,在长30m、宽3 5m、高1m的水槽中比较系统地量测了浅水中绕平板岛屿的尾流区流场。分析了大尺度旋涡的运动规律,得到了尾流流动形式随尾流稳定性参数的变化规律。目前如此大尺度浅水岛屿尾流的定量实验研究并不多见。In former researches about wakes flow, the length scale in the spanwise direction of the wake generator is usually very large. While the wake flows in natural environments and hydraulic projects are often very shallow, compared with the horizontal dimension. Because of the limits of the bottom and side walls, the shallow wakes have some special characteristics. The digital particle image velocimetry (DPIV) is employed to study the flow field around a solid plate in shallow water. The experiments are carried out in a flume with 30?m long, 3.5?m wide and 1?m deep. The movement of large-scale vortex is analyzed. The changes of flow pattern with wake stability parameter are investigated. Such large-scale quantitative experimental study on shallow wakes can rarely be found in literature.

关 键 词：浅水尾流 粒子图像测速 几何变换 

分 类 号：TV142.1[水利工程—水力学及河流动力学]