Abstract In turbulent flows, the extent of erosive wear is given by particle impacts caused deviated from nominal flow by turbulent fluctuations. This paper describes an experimental determination of particle impact angle and impact direction distributions from collective wear scar features by image analysis. A slurry pot is used to produce wear damage on copper in exposure to a dilute slurry of glass beads. Degradation is evaluated by weight loss, and topography data for the image analysis is acquired by non-contact 3D profilometry. The results reveal that most of the kinetic energy is transferred by the tangential component of the impact velocity at shallow impact angles, regardless the particle size. Particle impact conditions do not distribute Gaussian and a statistical cut-off angle is established.

中文翻译：

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湍流泥浆流下的侵蚀：通过图像处理确定颗粒撞击角度、撞击方向及其分布的实验

摘要 在湍流中，侵蚀磨损的程度是由湍流波动导致偏离标称流的颗粒冲击给出的。本文描述了通过图像分析从集体磨痕特征中确定粒子撞击角度和撞击方向分布的实验。浆料罐用于在暴露于稀释的玻璃珠浆料时对铜产生磨损损坏。降解通过重量损失进行评估，用于图像分析的地形数据通过非接触式 3D 轮廓测量获得。结果表明，无论颗粒大小如何，大部分动能都是通过小冲击角度下冲击速度的切向分量传递的。粒子撞击条件不呈高斯分布，并建立了统计截止角。