倾斜下表面过冷池沸腾实验研究

Experimental Investigation on Subcooled Boiling Heat Transfer on Declining Downward Surface

倾斜下表面的沸腾换热可模拟球形下表面的沸腾换热 ,这对严重事故下压水反应堆压力容器的非能动保护非常重要 .对大气压力下倾斜下表面的过冷池沸腾换热进行了实验研究 .对不同倾斜角度通过实验进行了观察和测量 .结果表明 ,倾斜角对换热系数的影响仅在小倾斜角时较大 .给出了不同倾斜角下换热系数和热流密度的拟合关系式 .

Local subcooled boiling heat transfer on curved downward surface, which is of great significance to passive protection of reactor vessel under serious accident, can be simplified as that on declining downward surface. This paper presented an experimental investigation to subcooled boiling heat transfer on the declining downward surface. At different declining angles: 15°, 30°, 45°, 60° and 75°, experimental data was acquired and a visualization system was employed to record the observation. It is concluded that only at small declining angles is the diversity of boiling heat transfer coefficients remarkable. Based on the experiment data, some α q correlations were also obtained.