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| HPIV及其初步应用研究 | |
| 引用本文： | 段俐,康琦,丁汉泉,申功炘.HPIV及其初步应用研究[J].北京航空航天大学学报,2000,26(1):83-86. |
| 作者姓名： | 段俐 康琦 丁汉泉 申功炘 |
| 作者单位： | 1. 北京航空航天大学 飞行器设计与应用力学系; 2. 中国科学院 力学研究所国家微重力实验室; 3. 北京航空航天大学 理学院 |
| 摘 要： | 全息粒子图像测速技术（HPIV）为一种对流体容积（三维空间）进行瞬时三维 (u,v,w) 速度场测量的技术.本项研究采用了双YAG脉冲激光器二次曝光、漫射照明、参考光对称布置全息术记录三维空间的粒子三维位移场，再现粒子空间场又采用了体视粒子图像测速技术分别截取各切面上的粒子三维位移场，其中由于采用了不同方向的参考光分别再现不同曝光时刻的粒子图像，可以用互相关技术，实行位移方向的自动判别.本项技术用 于立方体对角水流中的三维旋涡流动的瞬态三维速度场的初步测量.本文给出了瞬时复杂的三维旋涡部分空间结构和速度场分布图. |
| 关 键 词： | 流动测量 数字图像处理 脉冲全息照相 互相关 三维重建 |
| 收稿时间： | 1998-08-04 |
| 修稿时间： | : |
HPIV and its Application |
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| DUAN Li,KANG Qi,DING Han-quan,SHEN Gong-xin.HPIV and its Application[J].Journal of Beijing University of Aeronautics and Astronautics,2000,26(1):83-86. | |
| Authors: | DUAN Li KANG Qi DING Han-quan SHEN Gong-xin |
| Institution: | 1. Beijing University of Aeronautics and Astronautics,Dept. of Flight Vehicle Design and Applied Mechanics; 2. Chinese Academy of Sciences,Institute of Mechanics; 3. Beijing University of Aeronautics and Astronautics,School of Science |
| Abstract: | HPIV technology can realize the measurement of three dimensional velocity ( u,v,w ) in a three dimensional space. Using two Nd: YAG pulsed lasers , two exposures, two symmetry reference lights, and off line holographic technique, three dimensional particle flow field was recorded. Using SPIV technique's photographic method, two directions' particle images were obtained for three dimensional calculation. Using cross correlation, the velocity direction was resolved.Using this HPIV system, the three dimensional vortex flow passed diagonally through a cubic box was measured. The measurement of three component velocity in three dimensional flow field was realized. |
| Keywords: | flow measurement digital image processing pulse holography cross correlation 3D reconstruction |
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