短时间路德维格管设备的光学表面摩擦测量

20th International Congress on Instrumentation in Aerospace Simulation Facilities, 2003. ICIASF '03. Pub Date : 2003-08-25 DOI:10.1109/ICIASF.2003.1274865

E. Schulein

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引用次数: 7

摘要

利用图像采集、图像处理和表面摩擦计算，支持DLR Ludwieg-tube设施的表面摩擦测量。在给定剪切应力分布的不同流动条件下，通过分析试验验证了油膜干涉测量技术在三维梯度流动中测量表面摩擦的优点和缺点。通过对二维和三维激波/湍流边界层相互作用流的实验，验证了油膜技术在短持续时间风洞中的应用。

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Optical skin friction measurements in the short-duration Ludwieg tube facility

The utilization of image acquisition, image processing and skin friction computations has been developed to support skin friction measurements at the Ludwieg-tube facility at DLR. Verification of the oil-film-interferometry technique with analytical tests at different flows with given shear stress distributions showed its advantages and handicaps for skin friction measurements in 3D gradient flows. The abilities of the thin oil film technique with its application in a short duration wind tunnel are demonstrated on some 2D and 3D shock wave / turbulent boundary layer interaction flows.

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来源期刊

20th International Congress on Instrumentation in Aerospace Simulation Facilities, 2003. ICIASF '03.

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