化工学报2019，Vol.70Issue(1)：49-55,7.DOI:10.11949/j.issn.0438⁃1157.20180786
纯水静态闪蒸起始阶段气泡群时空分布规律的实验研究
Experimental study on temporal and spatial distribution of bubbles during initial stage of static flash of pure water
摘要
Abstract
Experimental study on temporal and spatial distribution of bubbles during initial stage of static flash of pure water was carried out with depressurization rates varying between 0.27 MPa·s-1 and 0.64 MPa·s-1, and the initial height of waterfilm at 0.2 m. The results indicated that bubbles appeared primarily within the stage of pressure’s rapid decline. In terms of temporal distribution, the faster the pressure dropped, the earlier the bubbles turned up, and the faster the number of bubbles increased with time, and also the earlier the bubble number reached its maximum value. In terms of spatial distribution, the number of bubbles grew in trend of "slow-quick-slow"with increasing depth. Small depressurization rate could narrow bubble distribution along depth. At the same depth, the faster the pressure dropped, the larger the bubble number was. At the end of pressure’s fast decline, the relative bubble number had a peak value with increasing depth. Finally, above experiment results were fitted into a pair of correlations for the temporal and spatial distribution of bubbles. Their calculation results matched well with experimental results.关键词
静态闪蒸/气泡群/时间分布/空间分布/压降速率Key words
static flash/bubble/temporal distribution/spatial distribution/depressurization rate分类
能源科技引用本文复制引用
梁婷,张丹,杨庆忠,严俊杰..纯水静态闪蒸起始阶段气泡群时空分布规律的实验研究[J].化工学报,2019,70(1):49-55,7.基金项目
国家重点研发计划项目(2018YFB0604303) （2018YFB0604303）
