There are widely abrasive invalidation effects which will lead to great economic lose and serious engineering problems of hydraulic machines worked in solid-liquid two-phase flow.

• 工作在固液两相流条件下的水力机械普遍存在破坏程度不一的冲蚀磨损作用,给工程实践和经济效益带来严重的阻碍和巨大的损失。