水力发电学报2013，Vol.32Issue(2)：129-132,183,5.
不同半径掺气泡对空泡泡壁压力影响的数值研究
Numerical study on effect of aeration bubbles with different radii on wall pressure of cavitation bubble
摘要
Abstract
The behavior of cavitation bubble wall pressure under the influence of aeration bubble of different radii is studied to consider the effects of vapor and noncondensable gas inside a cavitation bubble and the effects of air inside an aeration bubble in this study. Dynamical models for interaction of these two bubbles in viscous compressible liquid are developed, and coupling equations are used for description of the effects of aeration bubble on the cavitation bubble. Calculations indicate that with a given initial radius of the aeration bubble, the maximum collapsing pressure on the wall of cavitation bubble increases when its air content is reduced. As the initial radius is increased, this maximum pressure temporally climbs up and then declines, resulting in a peak value. This means that if collapsing in a higher pressure region, the cavitation bubble would be prevented from excessive compression and its capacity of cavitation erosion be lowered. Therefore, in terms of bubble interaction behavior, the radius of aeration bubble has an optimum value, which is valuable to cavitation control by aeration.关键词
水力学/掺气泡/空泡/相互作用/压力Key words
hydraulics/ aeration bubble/ cavitation bubble/ interaction/ pressure分类
建筑与水利引用本文复制引用
郭志萍,董志勇..不同半径掺气泡对空泡泡壁压力影响的数值研究[J].水力发电学报,2013,32(2):129-132,183,5.基金项目
国家自然科学基金项目(50879078) （50879078）
浙江省重点科技创新团队计划(2010R50035) （2010R50035）
