3-D PTV Velocity Measurement applied to the Flow in a Complex Flow Geometry
3-D PTV Velocity Measurement applied to the Flow in a Complex Flow Geometry
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应用于复杂流动几何形状的流动的 3-D PTV 速度测量
DOI：
10.3154/jvs.14.supplement1_17
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
H. Sugiyama
中科院分区：
文献类型：
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作者：
N. Ninomiya;M. Akiyama;H. Sugiyama
三维粒子跟踪测速仪（3-D PTV）是测量瞬时三维速度矢量分布的有力工具。尽管它的显着的能力，它只能适用于流场在一个简单的几何形状，因为它的复杂的相机校准过程。虽然已经进行了一些修改，在相机参数中隐式地处理玻璃墙处的折射，但它们的应用仍然限于平行平面的情况。目前，提出了一种新的方法，计算所有的折射在任何表面显式。因此，可以避免摄像机校准的复杂性，并且可以测量复杂几何形状中的任何流场，如果其形状通过数值已知的话。本文介绍了新的摄像机标定技术的原理和在圆弯管中进行实际测量的步骤。
The three-dimensional particle tracking velocimeter (3-D PTV) is a powerful tool for measuring the instantaneous three-dimensional distributions of the velocity vectors. Despite of its significant ability, it can be applied only to the flow field in a simple geometory, because of its complex camera calibration procedure. Although there have been made some modifications that handle the refraction at the glass walls implicitly in the camera parameters, but their applications are still limited to the case of parallel planes. Presently, a new method is proposed that calculates all the refractions at any surface explicitly. Thus, one can avoid the complexity in the camera calibration and can measure any flow field in the complex geometry, if the shape of which is known by the numerics. The principle of the new camera calibration technique and the procedures for the practical mesurement in a circular curved pipe is shown in this study.