旋流器内气泡聚并与破碎行为
Study on agglomeration and fragmentation behaviors of bubbles in cyclone
杨蕊 1肖迎松 1朱宝锦 1柴煜炜 1杨贤呈 1赵盎2
作者信息
- 1. 东北石油大学 机械科学与工程学院,黑龙江 大庆 163318;黑龙江省石油石化多相介质处理及污染防治重点实验室,黑龙江 大庆 163318
- 2. 东北石油大学 机械科学与工程学院,黑龙江 大庆 163318
- 折叠
摘要
为了探究旋流器内气泡聚并与破碎行为的影响因素,采用高速摄像实验研究旋流器内的气液两相流.通过实验分析了气泡在旋流场中的聚并和破碎行为,考察不同工况条件对气泡聚并与破碎的影响,同时运用数值模拟进行验证.结果表明,入口速度提升会导致气泡的破碎频率增加,生成子气泡也越多,但同时加剧了气泡的聚并性能,促使气泡聚并成气核朝着溢流口方向运移,因此入口速度提升对气泡直径变化的影响呈正向作用.气体体积分数提升会导致旋流器内气泡直径和气核长度增大,降低了流场的旋流强度,使更多气泡聚并成气核从底流口流出,故气体体积分数对气泡直径变化的影响呈反向作用.
Abstract
In order to investigate aggregation and fragmentation behaviors of bubbles in a cyclone,a high-speed camera was used to investigate the gas-liquid two-phase flow.Effects of working conditions on aggregation and fragmentation of bubbles were studied,which was also verified using numerical simulation.The results show that increase of inlet velocity leads to the increase of bubble breakage frequency and more sub-bubbles.Meanwhile,it also increases bubble agglomeration and prompts bubbles to agglomerate and move towards overflow.Therefore,the increase of inlet velocity has a positive effect on bubble diameter.The increase of gas contents resulted in bubble diameter and nucleus length increase in the cyclone,which reduced the cyclonic strength and caused more bubbles to merge into nuclei and flow out of the bottom.Therefore,the increase of gas contents has a negative effects on bubble diameter.
关键词
气液两相流/气泡/聚并/破碎/气液旋流器Key words
gas-liquid two-phase flow/bubble/agglomeration/fragmentation/gas-liquid cyclone引用本文复制引用
基金项目
东北石油大学青年科学基金(2018QNL-50)
出版年
2024
国家科技期刊平台
NSTL
万方数据