采用先进的光学计量学对高Reynolds number减速边界层的广泛表征
Extensive characterization of a high Reynolds number decelerating boundary layer using advanced optical metrology
摘要：
本文介绍了在EUHIT项目框架内进行的一项实验，该实验旨在表征逆压梯度边界层流中的大尺度结构。使用多达16台sCMOS摄像机进行大尺度湍流边界层PIV测量，具有大视场和适当的空间分辨率。为了获得结构的展向/壁面法向特征，在特定的流向位置进行了展向/壁面法向平面的立体PIV测量。为了补充这些大视场测量，进行了长距离微型PIV、时间分辨近壁速度剖面和基于膜的测量，以确定沿模型的一些特定位置处的壁面剪切应力及其波动。
英文摘要：
An experiment conducted in the framework of the EUHIT project and designed to characterize large scale structures in an adverse pressure gradient boundary layer flow is presented. Up to 16 sCMOS cameras were used in order to perform large scale turbulent boundary layer PIV measurements with a large field of view and appropriate spatial resolution. To access the span-wise / wall-normal signature of the structures as well, stereoscopic PIV measurements in span-wise/wall-normal planes were performed at specific stream-wise locations. To complement these large field of view measurements, long-range micro-PIV, time resolved near wall velocity profiles and film-based measurements were performed in order to determine the wall-shear stress and its fluctuations at some specific locations along the model.
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