MEASUREMENT OF 3-DIMENSIONAL TEMPERATURE FIELDS ABOVE HEATED SURFACES BY HOLOGRAPHIC INTERFEROMETRY
MEASUREMENT OF 3-DIMENSIONAL TEMPERATURE FIELDS ABOVE HEATED SURFACES BY HOLOGRAPHIC INTERFEROMETRY
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DOI：
10.1016/0017-9310(74)90054-4
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发表时间：
1974-01-01
影响因子：
5.2
通讯作者：
VEST, CM
中科院分区：
文献类型：
--
作者：
SWEENEY, DW;VEST, CM
光学全息技术可以记录多向干涉数据，为测量流体中的三维、非对称温度场或密度场提供了基础。如果连续光程长度数据在180°视角上可用，则显示温度或密度场等于数据的反Radon变换。本文提出了一种基于有限视角下采集的离散数据计算有限分辨率场重建的方法。采用全息干涉技术绘制了在加热的水平矩形表面上发展中的对流羽流等温轮廓。研究发现，羽流的热结构在很大程度上受沿几何对称线分布的邻近表面气流的影响。
Optical holography can be used to record multi-directional interferometric data, which provides a basis for measuring three-dimensional, asymmetric temperature or density fields in fluids. If continuous optical pathlength data are available over a 180° angle of view, the temperature or density field is shown to be equal to the inverse Radon transform of the data. A procedure for computing limited-resolution reconstructions of the field in terms of discrete data collected over a limited angle of view is presented.The technique of holographic interferometry was used to map isothermal contours in the developing convective plume above heated, horizontal, rectangular surfaces. It was found that the thermal structure of the developing plume is strongly influenced by the partitioning of the flow adjacent to the surface along lines of geometric symmetry.