振动及加热壁面条件下的近壁空泡溃灭可视化研究
Visualization of Bubble Collapse near the Wall Under Vibrating and Heating Wall Boundaries
吴焱 1张鹏飞 1黄钰期1
作者信息
- 1. 浙江大学 动力机械及车辆工程研究所,杭州 310027
- 折叠
摘要
采用低压电火花生成空泡的方式系统研究了复杂壁面条件下的近壁空泡溃灭行为.通过不同类型振动壁面及不同温度壁面附近的空泡溃灭行为的可视化试验,发现壁面振动对空泡溃灭有促进作用,空泡溃缩过程更快,体积变化更显著.不同类型壁面对空泡溃灭过程的影响不同,柱形壁面相较于球形壁面,近壁的空泡形态较不规则,溃灭呈现整体塌陷的趋势,在反弹阶段会形成不规则的空泡云.壁面升温会使得近壁空泡产生明显趋向于壁面的溃灭行为,并伴随多次空化的现象,这会对壁面造成严重损伤.
Abstract
The single bubble collapsing near a wall under complicated wall boundaries was comprehensively investigated using spark-induced cavitation method.Visualization on the collapse behavior of bubbles near different types of vibrating walls and walls with different temperatures reveal that wall vibration promotes bubble collapse,resulting in a faster collapse process and a larger volume change.The effects of different types of walls on the process of bubble collapse differ,columnar walls compared to spherical walls would cause the shape of the bubble near the wall to be more irregular,the collapse shows an overall collapse trend,and an irregular cloud of bubbles will form during the rebound stage.Furthermore,heating the wall interface leads the near-wall collapse which plainly tends to the wall surface and is followed by recurred cavitation,delivering substantial damage to the wall interface.
关键词
空化/振动壁面/加热壁面/射流/溃灭Key words
cavitation/vibrating wall/wall heating/jet flow/collapse引用本文复制引用
基金项目
国家自然科学基金面上项目(52076193)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据