Measurements of Erosion Damage due to Solid Particle Impingement and Numerical Prediction of the Damage in Fluid Machinery

流体机械中夹带的固体颗粒由于颗粒与水之间的密度差异而与水流线分开移动，并撞击机械的壁表面。它会对表面造成侵蚀破坏。然而，没有任何可用的冲击速度和磨损之间的定量关系的估计。本研究计画已开始获得此关系式，并提出一种更有效的预测方法，以评估流体机械的冲蚀破坏。实验发现，冲蚀损伤随试件材料和对壁冲击角度的不同而变化较大。从数值计算的工作，估计的冲击速度在套管壁上，基本上，不受颗粒碰撞模型与或不夹带的颗粒之间的相互碰撞。

Solid particles entrained in fluid machinery move separately from water streamline due to the difference in the densities between the particles and water, and impinge to wall surfaces of the machinery. It causes erosion damages on the surfaces. There are, however, nothing available to the estimation of the quantitative relationships between the impinging velocities and erosion ware. This research project has started to obtain the relationship and propose a more effective prediction method, which can estimate the erosion damage of fluid machinery. From the experiments, it is found that the erosion damage changes greatly according to the materials of test pieces and impinging angle against the wall. From the numerical work, estimated impinging velocities on the casing wall are, substantially, not affected by the particle impinging models with or without mutual colisions between the particles entrained.