Three-Dimensional Particle Tracking Velocimetry With Laser-Light Sheet Scannings
Three-Dimensional Particle Tracking Velocimetry With Laser-Light Sheet Scannings
复制标题
利用激光片扫描进行三维粒子跟踪测速
DOI：
10.1115/1.2817385
复制
发表时间：
1996
影响因子：
2
通讯作者：
Nobukazu Tanaka
中科院分区：
文献类型：
--
作者：
S. Ushijima;Nobukazu Tanaka
我们描述了三维粒子跟踪测速（3D PTV），它使我们能够获得比以前的技术显著更多的速度向量。与通常的立体图像记录不同，目前的3D PTV利用一对光学扫描仪产生的扫描激光片来可视化整个三维流，图像由与扫描同步的高速视频系统拍摄。推导速度分量的数字图像分析基于数值程序（Ushijima和Tanaka， 1994），其中在粒子图像的提取、位置的确定、速度分量的推导等方面进行了若干改进。将三维PTV应用于具有Ekman边界层的旋转流体，定量捕获了其复杂的二次流型和初次循环。
We describe three-dimensional particle tracking velocimetry (3D PTV), which enables us to obtain remarkably larger number of velocity vectors than previous techniques. Instead of the usual stereoscopic image recordings, the present 3D PTV visualizes an entire three-dimensional flow with the scanning laser-light sheets generated from a pair of optical scanners and the images are taken by a high-speed video system synchronized with the scannings. The digital image analyses to derive velocity components are based on the numerical procedure (Ushijima and Tanaka, 1994), in which several improvements have been made on the extraction of particle images, the determination of their positions, the derivation of velocity components and others. The present 3D PTV was applied to the rotating fluids, accompanied by Ekman boundary layers, and their complicated secondary flow patterns, as well as the primaty circulations, are quantitatively captured.