Abstract

As an extension of single-pixel particle image velocimetry (SP-PIV), a novel method to determine both the out-of-plane and in-plane velocity fields with single-pixel resolution is presented. With this approach, called dual-plane SP-PIV, mean velocity vector fields with three components (3C) can be measured with single-pixel resolution using a single-color camera and two differently colored laser sheets. The method computes the ensemble correlation across two planes illuminated simultaneously by the two laser sheets. The method is demonstrated via an experiment in which a rotating flow is induced by an impeller. The method is validated by comparing its results with those of conventional PIV. The results show good accordance in terms of the magnitudes and spatial distributions of the out-of-plane velocities and provide a new approach to 3C velocity field measurements with high spatial resolution.

Graphic abstract

中文翻译：

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使用单个摄像机进行像素级2D-3C速度场测量的双平面系综相关

摘要

作为单像素粒子测速仪（SP-PIV）的扩展，提出了一种确定具有单像素分辨率的平面外和平面内速度场的新颖方法。使用这种称为双平面SP-PIV的方法，可以使用单色相机和两个不同颜色的激光片，以单像素分辨率测量具有三个分量（3C）的平均速度矢量场。该方法计算在由两个激光片同时照射的两个平面上的整体相关性。该方法通过一个实验进行了证明，在该实验中，叶轮引起了旋转流。通过将其结果与常规PIV的结果进行比较，验证了该方法的有效性。

图形摘要