Development of the oil film method of skin friction measurement for curved and free oriented surfaces
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摘要: 本文叙述曲面和任意取向表面表面摩阻测量方法的进一步的发展.介绍用漫射照明获取薄油膜等厚度干涉条纹谱的理论根据和实验结果.讨论了通过油流显示图像的分析,自动探测表面流线方位的可能性.所得结论表明油膜法也能应用于复杂的三维流动.Abstract: A further development of the skin friction measurement technique for free oriented and curved surfaces is described.A theoretical basis and experimental results of using the diffuse lighting to obtain equal thickness fringe patterns of a thin oil film are presented.A possibility of automatic detection of the surface streamline position by analysing the oil visualisation images is discussed.The results obtained show a possibility of using the oil film method for complicated 3D flows.
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