【摘要】 本文应用数值模拟方法 ,对3D -PIV技术进行探讨。分别采用正直摄影和对称交向摄影两种方式 ,对均匀流动进行3D -PIV试验模拟。研究表明 :将2D -PIV技术拓宽 ,可以测量三维流动速度。在速度的三个分量中 ,两个面内速度分量测量精度较高 ,在1%左右 ,法向速度的测量精度可达到4.3%。本文的研究工作可为3D-PIV技术的试验实现提供有益的指导。更多还原

【Abstract】 In this paper, the mechanism of 3D-PIV technique is studied by numerical simulation.The numerical simulation test is carried out to homogeneous flow by the translation method and the angular method respectively.The results indicate that by combining the 2D-PIV technique and 3D-reconstruction theory,the 3D-PIV technique could be implemented to measure three-dimensional velocity distribution in a planar domain.The accuracy of inplane velocity component can reach about 1%,and is more high than that of the vertical velocity component which is about 4.0～6.0%. Although the numerical simulation is not full simulation,it would provide some profitable guide to 3D-PIV experiments.更多还原