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Key roles of micro-particles in water on occurrence of cavitation-erosion of hydro-machinery
  • ISSN号：1001-6538
  • 期刊名称：科学通报(英文版)
  • 时间：0
  • 页码：1603-1607
  • 语言：中文
  • 分类：O4[理学—物理]
  • 作者机构：[1]State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
  • 相关基金：Supported by the National Natural Science Foundation of China （Grant Nos. 50675112, 50475018 and 50505020）
  • 相关项目：超疏水表面形貌的界面效应影响研究
作者： Wang JiaDao|Qin Li|Chen HaoSheng|Li YongJian|Chen DaRong|
关键词： 气穴现象, 侵蚀作用, 表面粗糙度, 微粒物, cavitation, cavitation erosion, surface roughness, particles
中文摘要：

它被相信成穴直接导致麻蚀的大约 100 年了。它在这研究被建议成穴仅仅是必要条件然而并非麻蚀的足够的条件。在旋转磁盘成穴系统上执行的实验证明在液体戏微粒子在麻蚀进程的不可缺少的角色，和钢表面上的侵蚀坑的产生被粒子的尺寸也影响。样品表面上的这些裂缝和变丑显示侵蚀是机械行为的结果。数字计算也被提供支持这机制。

英文摘要：

It has been believed for about one hundred years that the cavitation directly induces the cavitation erosion. It is proposed in this research that cavitation is only the necessary condition but not the sufficient condition of the cavitation erosion. The experiment performed on the rotary disk cavitation system shows that the mi- cro-particles in the fluid play indispensable roles in the cavitation erosion process, and the generation of the erosion pits on the steel surface is also affected by the particles＇ size. These cracks and deformations on the sample surface indicate that the erosion is the result of the mechanical behavior. Numerical calculations are also provided to support this mechanism.

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