制冷学报2016，Vol.37Issue(5)：93-99,111,8.DOI:10.3969/j.issn.0253-4339.2016.05.093
喷雾参数对喷雾冷却换热特性影响的实验研究
The Influence of Spray Parameters on Heat Transfer Characteristics in Spray Cooling
刘妮 1李丽荣 1黄千卫 1钟泽民1
作者信息
- 1. 上海理工大学能源与动力工程学院制冷技术研究所 上海 200093
- 折叠
摘要
Abstract
Testing system is built up to study the heat transfer characteristics of micro⁃structure and smooth surface under the conditions of different spray height and spray pressure. The experiment is carried out in a closed loop spray cooling system with water as the working flu⁃id with high speed camera. The experimental results indicate that both the spray height and spray pressure play more significant role in the spray cooling performance of the micro⁃structure surface than smooth surface. When the spray height staying in a high level, decreasing it until the critical height as indicated can obviously improve the heat flux, acquire higher CHF;Continually reducing the spray height can still slightly improve the heat flux, but a large margin reduction of the spray height can result in a decrease of heat flux and even delay the time of transition to two phase region. Thus the influence of spray height has two sides, different from the spray pressure, whose effect is monistic. Increasing the spray pressure can improve the heat flux and enhance the uniformity of the temperature distribution, especially in single phase region, and the heat flux increase obviously until to a stable value with the increasing of spray pressure.关键词
喷雾冷却/喷雾高度/喷雾压力/CHF/温度均匀性Key words
spray cooling/spray height/spray pressure/CHF/temperature uniformity分类
能源科技引用本文复制引用
刘妮,李丽荣,黄千卫,钟泽民..喷雾参数对喷雾冷却换热特性影响的实验研究[J].制冷学报,2016,37(5):93-99,111,8.
