竖直窄流道内过冷流动沸腾的汽泡生长过程流场特性分析

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基金项目:

空泡物理和自然循环国家级重点实验室基金资助项目(9140C7101020802,9140C710901090C71)

国家自然科学基金(50406012)

Flow Field Characteristics of Bubble Growth of Subcooled Flow Boiling in Vertical Narrow Rectangular Channel

摘要: 采用VOF模型建立了过冷流动沸腾中的汽泡生长模型,使用UDF接口自编程序,对汽泡生长过程进行了数值模拟。考虑了主流速度、主流过冷度、壁面过热度、汽-液接触角等对汽泡生长过程的影响,获得了过冷流动沸腾条件下汽泡生长曲线,并与相应实验条件下的实验结果进行了对比,同时对汽泡的生长过程中的汽泡内外的流场进行了分析。
- 过冷沸腾 /
- 汽泡生长 /
- VOF模型
Abstract: A growth model of bubbles in sub-cooling flow boiling was established by VOF two-phase flow model,and the bubble growth process was numerically simulated by UDF interface procedures. The factors such as the velocity of mainstream speed,sub-cooling degree of the mainstream,the degree of the heating wall and vapor-liquid contact angle were considered in the simulation. The growth curve of bubbles in subcooling flow boiling was also obtained. The velocity field of bubble growth process was investigated atdifferent working conditions. The relationship between the bubble inner velocity field and the velocity speed of the interface was also studied.
- Sub-cooling flow boiling /
- Bubble growth /
- VOF Model