窄流道内过冷流动沸腾条件下汽泡滑移特性研究

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基金项目:

中国核动力研究设计院空泡物理和自然循环国家级重点实验室2008年基金资助项目(9140C7101020802)

国家自然科学基金(50406012)

An Investigation of Bubble Slipping Characteristics of Subcooled Flow Boiling in Narrow Rectangular Channel

1. Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, 400044, China;
2. CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institute of China, Chengdu, 610041, China

摘要: 对竖直矩形窄流道内的汽泡滑移进行可视化实验,得到汽泡滑移运动的特性和滑移距离随工况变化的特性。建立基于能量平衡的热量分析模型,研究汽泡滑移对换热特性的影响。分析表明,滑移运动的汽泡比周期性固定生长的汽泡所引起的强化换热效果更显著。本文引入滑移汽泡扰动强度的概念,提出了滑移汽泡和固定汽泡扰动所导致的热流密度表达式,并分析了二者的差异。
- 汽泡滑移 /
- 换热分析 /
- 过冷沸腾
Abstract: The sliding bubbles in the vertical rectangular narrow channel were studied using visualization test section.It obtained the bubble sliding characteristics about the sliding distance changing with working conditions,and established the heat analysis model based on energy balance to research the impact of bubble sliding on the characteristics of heat transfer.Analysis showed that the bubble with sliding movement had a significant heat transfer enhancement than the bubble with fixed growth which did not slid.With the concept of disturbance intensity of sliding bubble proposed,it put up the heat flux expression caused by disturbance of sliding bubble and fixed bubble,and analyzed the difference between them.
- Bubble sliding /
- Subcooling flow boiling /
- Heat transfer analysis