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粒子图像测速（PIV）系统是由图像采集部分（包括工业摄像机、录像机、监视器等）与图像处理部分（包括计算机、监视器、打印机等）所组成。并采用PIV技术对重力式油水分离试验模型的主要构件（入口件、整流件、聚结件和集液件）中的几种典型结构进行了模拟试验筛选，并成功地获得了模型流场的两维速度图像，进而提出了一些流动特性良好的分离设备优化结构模型，由此建立了一些新型分离设备的结构优化模型，为今后深入研究重力式分离设备打下了良好的基础。
The Particle Image Velocimetry (PIV) system is composed of image acquisition parts (including industrial cameras, video recorders, monitors, etc.) and image processing parts (including computers, monitors, printers, etc.). PIV technology was used to simulate and test several typical structures in the main components of gravity oil-water separation test model (inlet, rectifier, coalescence and liquid collection), and successfully obtained the model flow field Two-dimensional velocity images, and then put forward some good flow characteristics of the separation device optimization structure model, which established a number of new separation device structure optimization model for the future in-depth study of gravity separation equipment laid a good foundation.