化工学报2018，Vol.69Issue(6)：2439-2445,7.DOI:10.11949/j.issn.0438-1157.20171279
文丘里式气泡发生器内气泡破碎机制分析
Bubble breakup mechanism in Venturi-type bubble generator
摘要
Abstract
As efficient and safe equipment, Venturi-type bubble generators have wide application in general and chemical industry. There are few researches about process and mechanism of bubble breakup inside generators. Previous studies showed that large bubbles were rapidly decelerated after entered diverging section of a Venturi-type bubble generator, which was probably critical to bubble breakup process. In this paper, large-eddy simulation on flow in a Venturi-type bubble generator showed existence of an obvious vortex region near wall of the diverging section. A strong collision between front of the vortex region and fluid from upstream fast decelerated fluid upon entering the region and significantly increased static pressure near confluence of vortex region and mainstream. When a bubble was moving through the region, it would be greatly decelerated by a surge in pressure gradient force and mass-added force, which intensified interaction with ambient fluid. Under a high liquid velocity condition, the bubble could be severely deformed and even broken..关键词
文丘里式气泡发生器/减速过程/数值分析/涡流场/静压Key words
Venturi-type bubble generator/deceleration process/numerical analysis/vortex field/static pressure分类
化学化工引用本文复制引用
邵梓一,张海燕,孙立成,莫政宇,杜敏..文丘里式气泡发生器内气泡破碎机制分析[J].化工学报,2018,69(6):2439-2445,7.基金项目
国家自然科学基金项目(51376052, 51506099, 51606130). supported by the National Natural Science Foundation of China (51376052, 51506099, 51606130). （51376052, 51506099, 51606130）
