Wavefront sensing for single view three-component three-dimensional flow velocimetry
Wavefront sensing for single view three-component three-dimensional flow velocimetry
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DOI：
10.1007/s00348-006-0204-z
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发表时间：
2006-12-01
影响因子：
2.4
通讯作者：
Towers, D. P.
中科院分区：
文献类型：
--
作者：
Angarita-Jaimes, N.;McGhee, E.;Towers, D. P.
我们介绍了波前传感在粒子图像测速中的应用，用于单视图三分量（3C）、三维（3D）流量测量。该技术是基于测量被示踪粒子散射的波前，并从该波前可以确定三维示踪的位置。因此，从时间分解的三维粒子位置序列中获得速度矢量场。描述了捕获测量波前所需数据的两种方法：使用畸变衍射光栅的多平面成像和变形技术。这两种技术都具有光学效率，鲁棒性，并且与流动示踪剂的相干和非相干散射兼容。用单模光纤源表示示踪粒子，对深度（范围）分辨率和可重复性进行了定量实验。变形方法被证明具有最大的测量范围，因此被选择用于在稀疏种子气相流上使用该技术的三维粒子成像测速（PIV）的第一个原理证明实验。
We present the application of wavefront sensing to particle image velocimetry for three-component (3C), three-dimensional (3D) flow measurement from a single view. The technique is based upon measuring the wavefront scattered by a tracer particle and from that wavefront the 3D tracer location can be determined. Hence, from a temporally resolved sequence of 3D particle locations the velocity vector field is obtained. Two approaches to capture the data required to measure the wavefronts are described: multi-planar imaging using a distorted diffraction grating and an anamorphic technique. Both techniques are optically efficient, robust and compatible with coherent and incoherent scattering from flow tracers. The depth (range) resolution and repeatability have been quantified experimentally using a single mode fiber source representing a tracer particle. The anamorphic approach is shown to have the greatest measurement range and hence was selected for the first proof of principle experiments using this technique for 3D particle imaging velocimetry (PIV) on a sparsely seeded gas phase flow.