THE 3-D TURBULENT PTV BY USING TWO-MEDIA PHOTOGRAMMETRY  

作　　者：Suo Jin Zhang Hong-min Wu Wen-zhou (Taiyuan University of Technology, Taiyuan, Shanxi, 030024, P. R. China) 

出　　处：《Journal of Hydrodynamics》1994年第4期1-8,共8页水动力学研究与进展B辑（英文版）

摘　　要：In this paper a more extensive application of 3-D PTV on visualization and reconstruction of turbulent flows has been developed: (1) the nonlinear Perspective transformation equations on two-media photogrammetry is used to determine the camera parameters and the Position of tracks in water, (2) an optimization algorithm made the resolution of the calibration much higher, (3) the adhesion and intersection between track images have been recognized and separated by using an automated digital image processing program, so the velocity vectors have been increased in a measuring volume, (4) automatically identify the corresponding track image between stereo Pair images that instantaneously taken and calculate the positions of tracks on 3-D space, (5) a succession of velocity profiles in a turbulent flow are measured and reconstructed.In this paper a more extensive application of 3-D PTV on visualization and reconstruction of turbulent flows has been developed: (1) the nonlinear Perspective transformation equations on two-media photogrammetry is used to determine the camera parameters and the Position of tracks in water, (2) an optimization algorithm made the resolution of the calibration much higher, (3) the adhesion and intersection between track images have been recognized and separated by using an automated digital image processing program, so the velocity vectors have been increased in a measuring volume, (4) automatically identify the corresponding track image between stereo Pair images that instantaneously taken and calculate the positions of tracks on 3-D space, (5) a succession of velocity profiles in a turbulent flow are measured and reconstructed.

关 键 词：turbulent flow PTV two-media photogrammetry. 

分 类 号：O353.5[理学—流体力学]