横流冲击射流尾迹涡结构的实验研究  

Experimental Study for Wake Vortices of an Impinging Jet in Crossflow

作　　者：张燕 樊靖郁[1] 王道增[1] 

机构地区：[1]上海市应用数学和力学研究所,上海大学上海200072 [2]中瑞联合微系统集成技术中心,上海大学 [3]查尔默斯理工大学应用力学系

出　　处：《力学季刊》2005年第4期539-543,共5页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金资助项目(10572084);上海市重点学科建设资助项目(Y0103)

摘　　要：本文采用LIF(激光诱导荧光)流动显示和PIV(粒子图像速度场仪)测量对横流冲击射流的尾迹涡结构进行了实验研究。水槽实验是在三种流速比和两种冲击高度实验工况下进行的。由实验结果可得到两种明显的尾迹涡结构、即射流尾迹涡和横流尾迹涡。横流冲击射流中形成的主要尾迹涡结构主要依赖于流速比。本文还对横流冲击射流近区范围内射流尾迹涡和横流尾迹涡的形成机理和演化特征进行了分析。The wake vortices of an impinging jet in crossflow were studied experimentally by means of laser-induced fluorescence （LIF） flow visualization and particle image velocimetry （PIV） measurement. The experiments were performed at three jet-to-crossflow velocity ratios and two impingement heights in a water channel. Two kinds of distinctive wake vortices were identified from the experimental results, namely the jet wake vortices and the crossflow wake vortices. The dominant vortical structure in the wake of the impinging jet in crossflow is primarily dependent on the velocity ratio. The formation mechanism and evolving characteristics of the jet wake vortices and the crossflow wake vortices of the impinging jet in crossflow in near region were also discussed.

关 键 词：冲击射流 横流 尾迹涡 LIF流动显示 PIV测量 

分 类 号：O358[理学—流体力学]