基于时空粒子图像的管道流速测量方法及验证  

Measurement method and verification of pipeline flow velocity based on spatiotemporal particle image

作　　者：吴家星 王浩[1,2,3] 许帅 朱瑶勇 周朱晶 明晓 WU Jiaxing;WANG Hao;XU Shuai;ZHU Yaoyong;ZHOU Zhujing;MING Xiao(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;State Key Laboratory of Mechanics and Control for Aerospace Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Jiangsu Key Laboratory of Bionic Materials and Equipment,Nanjing 210016,China;College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学机电学院,江苏南京210016 [2]南京航空航天大学航空航天结构力学及控制全国重点实验室,江苏南京210016 [3]仿生材料与装备江苏省高校重点实验室,江苏南京210016 [4]南京航空航天大学航空学院,江苏南京210016

出　　处：《中国测试》2025年第1期105-110,共6页China Measurement & Test

基　　金：国家自然科学基金(52475304,61973159);航空航天结构力学及控制全国重点实验室自主研究课题(1005-ZAG23011)。

摘　　要：管道流速测量除了得到流动方向的平均速度,有时还需要得到垂直流动方向的速度分布。该文提出一种新的光学非接触测量方法——一维粒子图像测速法(one-dimensional particle image velocimetry,1D-PIV),利用垂直于流动方向粒子的一维空间信息和时间信息构建时空状态矩阵,相关上下游两处时空状态矩阵即可完成平均流速和流速分布的测量。以DN35 mm直管搭建实验测试系统,在颗粒浓度为0.04 g/L条件下测量流速范围为84.99~261.10 mm/s的管道流,以单粒子追踪测速法(single particle tracking,SPT)作比对,1D-PIV测量的平均流速最大相对误差为2.67%,速度剖面最大相对误差为近壁面的1.73%。实验结果证明1D-PIV是一种简单有效的管道流速测量方法。In addition to obtaining the average velocity in the flow direction,the velocity measurement of pipeline flow sometimes also requires obtaining the velocity distribution in the vertical flow direction.This article proposes a new optical non-contact measurement method,the one dimensional particle image velocimetry(1D-PIV),which utilizes one-dimensional spatial and temporal information of particles perpendicular to the flow direction to construct a spatiotemporal state matrix.By correlating the spatiotemporal state matrices of the upstream and downstream,the average flow velocity and flow velocity distribution can be measured.An experimental testing system was constructed using a DN35 mm straight pipe,and the flow rate in the pipeline was measured in the range of 84.99-261.10 mm/s under the condition of particle concentration of 0.04 g/L.Compared with the single particle tracking(SPT)method,the maximum relative error of the average flow rate measured by 1D-PIV was better than 2.67%,and the maximum relative error of the velocity profile was 1.73%near the wall.The experimental results demonstrate that 1D-PIV is a simple and effective method for measuring pipeline flow velocity.

关 键 词：管道流速测量 一维粒子图像测速 时空状态矩阵 互相关 单粒子追踪 

分 类 号：TB96[机械工程—光学工程] O351[一般工业技术—计量学]