实验流体力学2026，Vol.40Issue(2)：40-49,10.DOI:10.11729/syltlx20230144
MHz高速PIV实验技术研究
Study on MHz high-speed PIV technique
摘要
Abstract
Transonic flows have presented an enduring challenge to experimental research due to their intricate and unsteady flow characteristics.This study investigated the megahertz-frequency Particle Image Velocimetry(MHz-PIV)technique to enhance the resolution of small time-scale flows under the transonic flow conditions.During the measurement,five high-speed cameras alternately and quickly captured images of the same measurement area,and thus obtained ultra-high time resolution particle image data.By employing image processing techniques,optical distortion correction and identification of the common area were achieved.The application of the ensemble correlation algorithm,coupled with spectral analysis of the compressible turbulent flow field based on the velocity field,contributed to a comprehensive analysis.The experiment validated the high-frequency sampling capability of MHz-PIV,which significantly reduces the technology's dependence on camera performance.This approach offers a refined measurement technique with high spatiotemporal resolution for transonic experiments.关键词
跨声速/粒子图像测速技术/时空分辨率/图像处理/湍流功率谱Key words
transonic/particle image velocimetry/spatiotemporal resolution/image processing/turbulent power spectrum分类
数理科学引用本文复制引用
鲁鑫涛,赵航,佘文轩,涂晗,高琪,魏润杰,张放,陈爽..MHz高速PIV实验技术研究[J].实验流体力学,2026,40(2):40-49,10.基金项目
国家重点研发计划资助项目(2020YFA0405700) （2020YFA0405700）
