Cavitation damage reduction by microbubble injection
Cavitation damage reduction by microbubble injection
复制标题
DOI：
10.1016/j.nima.2007.12.021
复制
发表时间：
2008-03
影响因子：
1.4
通讯作者：
T. Naoe;M. Ida;M. Futakawa
中科院分区：
文献类型：
--
作者：
T. Naoe;M. Ida;M. Futakawa
对机械诱导压力脉冲引起的空化现象进行了一系列实验，为向液体中注入气体微泡可以减少空化损伤提供了实验证据。本研究采用液态汞作为散裂中子源产生高强度中子束的工质，实验在三种不同的流动条件下进行：单相静止、单相流和泡状流。实验表明，与静态情况相比，流动水银可以减少空化损伤，向水银流动中注入微泡可以进一步显著降低空化损伤。在泡状流情况下发现的负压值的轻微降低似乎是理解所观察到的空化损伤减少机制的关键。
A series of experiments on cavitation caused by mechanically induced pressure pulses have been performed to provide experimental evidence that gas microbubbles injected into a liquid can reduce cavitation damage. The working fluid of the present study is liquid mercury as in spallation neutron sources to produce high-intensity neutron beams, and the experiments were conducted under three different flow conditions: single-phase static, single-phase flow, and bubbly flow conditions. The experiments suggested that compared to the static case, cavitation damage is reduced by flowing the mercury, and further remarkably reduced by injecting microbubbles into the mercury flow. A slight decrease in the magnitude of negative pressure found in the bubbly flow case appears to be a key to understanding the mechanism of the observed cavitation damage reduction.