化工学报2016，Vol.67Issue(6)：2211-2217,7.DOI:10.11949/j.issn.0438-1157.20151549
液滴冲击加热壁面沸腾现象特征分析
Characteristic analyses of boiling phenomena in process of drops impingement on heated surfaces
摘要
Abstract
An experimental process of liquid drops impingement on heated surfaces was observed using a high-speed digital camera, for which characteristics of boiling phenomena with different fluids were analyzed, and formation mechanisms of the central jet and pagoda-like bubbles were also discussed. At the surface temperature above the Leidenfrost point when the water drops impingement on the surfaces, a phenomenon of explosive boiling occurred, while that of the central jet happened for the drops of sodium chloride solution due to bubble entrainment with dramatic nucleation, and that of alcohol drops rebound entirely appeared. Otherwise, at the surface temperature below the Leidenfrost point, bubbly boiling was observed, for which different from hemispherical bubbles, pagoda-like bubbles appeared at the thicker film region. Moreover, the maximum spreading factor during drop rebound on heated surfaces was investigated quantitatively, which only can be influenced by the Weber number. Compared with the literatures, the empirical correlation of the spreading factor in this study can well predict the drop spreading scale on heated surfaces.关键词
液滴撞击/加热壁面/沸腾/铺展因子/气泡/成像/测量Key words
drop impact/heated surface/boiling/spreading factor/bubble/tomography/measurement分类
数理科学引用本文复制引用
梁刚涛,牟兴森,郭亚丽,沈胜强,张吉礼..液滴冲击加热壁面沸腾现象特征分析[J].化工学报,2016,67(6):2211-2217,7.基金项目
国家自然科学基金项目（51506023，51336001）；中国博士后科学基金项目（2015M571303）；中央高校基本科研业务费专项资金项目（DUT14RC(3)159）。@@@@supported by the National Natural Science Foundation of China (51506023,51336001), the China Postdoctoral Science Foundation (2015M571303) and the Fundamental Research Funds for the Central Universities of Ministry of Education of China(DUT14RC(3)159) （3）
