空蚀、磨损及其联合作用研究进展

Research progress of cavitation,silt abrasion and their synergism

空蚀、磨损及两者联合作用是目前流体机械破坏的重要原因,通过实验及数值模拟研究得到空蚀、磨损及两者联合作用的机理是发展流体机械优化设计方法、提高流体机械抵抗空蚀磨损破坏能力的基础.由于影响空蚀、磨损及两者联合作用行为的因素既有速度、压力等流场参数,又有沙粒和材料特性等,近年来此领域的研究在空蚀磨损及联合作用机理、各因素间的相互影响及高抗破坏材料等方面展开.基于此,本文选择性的分析了相关的报道文献,为进一步开展流体机械过流表面快速破坏机理的研究提供理论支持.

Cavitation, silt abrasion and their synergism cause severe damage to fluid machinery. The mechanism of cavitation, silt abrasion and their synergism can be studied by experiments and numerical simulation, which are the basis for optimizing the fluid machinery design and enhancing the life-span under those conditions. The factors which affect the behavior of cavitation, silt abrasion and their synergism include flow velocity, pressure, and the characteristics of sand and materials. Recently the research of this field focuses on the mechanism of damage in different conditions, interaction between different factors and high performance materials, etc. All these are briefly summarized in this review.