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粒子图像测速是一种基于流场图像互相关分析的二维流场非接触式测试技术,在流场测量中占有非常重要的地位。本文阐述了PIV粒子图像测速的基本原理及其在复杂流场测试中的应用状况,如泊肃叶流动及圆柱绕流、横流中水平方柱绕流旋涡、涡旋波流场、横流中近壁水平圆柱绕流旋涡、角区三维分离的附着奇点结构、漩流中间包流场、角区非定常马蹄涡结构。对掌握和了解PIV测试原理及方法具有一定的参考意义。
Particle image velocimetry is a two-dimensional flow field non-contact testing technique based on the cross-correlation analysis of flow images, which plays a very important role in the flow field measurement. This paper describes the basic principle of PIV particle image velocimetry and its application in complex flow field testing, such as Poiseuille flow and cylindrical flow, cross-flow vortex in horizontal cross-flow, vortex wave field, Wall horizontal cylinder around the flow vortex, three-dimensional separation of the corner area attached to the singular point structure, swirling tundish flow field, corner area unsteady horseshoe vortex structure. To master and understand the principle and method of PIV test has some reference value.