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主页 旧刊 有关人员 未来大会 American Society of Thermal and Fluids Engineering
Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

Implementation of Focused Plenoptic Time-Resolved 3D-PTV in the Analysis of a Vortex Flow

Jake Hadfield
Dept. of Mechanical Engineering, University of Alberta, Canada

David S. Nobes
University of Alberta, Department of Mechanical Engineering, Edmonton, T6G 2G8, Alberta, Canada

DOI: 10.1615/TFEC2017.emi.018384
pages 1317-1324

摘要

Focused plenoptic imaging is a measurement technique that can perform time-resolved 3D tracking of a particle-seeded fluid. The technique makes use of a single camera equipped with a microlens array, allowing capture of the complete light field. It has the advantage of being simple to set up compared to most other 3D techniques, requiring only a single optical view of the experiment. There are a number of challenges with implementing this technique. The small viewing angle available to this single-camera approach results in difficulty accurately calculating the depths of particles in the fluid. Techniques for addressing this limitation are being investigated. In particular, time-resolved 3D particle tracking has been implemented. Curve fitting along individual particle tracks is used herein to time-average the noise inherent in the depth estimations, with some success. This technique has been tested on the simple case of a steady vortex generated in a vortex chamber. The camera's viewpoint was parallel to the axis of the vortex to maximize the amount of out-of-plane motion that must be resolved by the imaging technique. Overall, this study indicates that implementing focused plenoptic imaging and time-resolved 3DPTV to detect fluid motion may be a viable method for interrogating the 3D motion of a fluid using a single camera.

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