Particle Image Velocimetry
Particle Image Velocimetry
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DOI：
10.1007/978-3-642-83787-6_4
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
L. Lourenço
中科院分区：
文献类型：
--
作者：
L. Lourenço
实验流体力学中最具挑战性和最耗时的问题之一是测量流场的整体特性，如速度场、涡度场和压力场。在许多实验中，使用热线（HW）或激光测速（LV）可以常规地进行速度场的局部测量（即单个点）。然而，许多当前感兴趣的流场，如剪切流或尾流中的相干结构，是高度不稳定的。此类流的高压或低压数据很难解释，因为需要整个流场的空间和时间信息，而且这些方法通常仅限于在少数空间位置同时测量。
One of the most challenging and time-consuming problems in experimental fluid mechanics is the measurement of the overall flow field properties, such as the velocity, vorticity, and pressure fields. Local measurements of the velocity field (i.e., at individual points) are now done routinely in many experiments using hot-wire (HW) or laser velocimetry (LV). However, many of the flow fields of current interest, such as coherent structures in shear flows or wake flows, are highly unsteady. HW or LV data of such flows are difficult to interpret, as both spatial and temporal information of the entire flow field are required and these methods are commonly limited to simultaneous measurements at only a few spatial locations.