Stability of Vapor Film under High Subcooled Condition

为了揭示在高过冷度条件下可能存在的汽膜特性，采用超疏水涂层和聚四氟乙烯斑点涂层进行了池沸腾实验。结果表明，具有聚四氟乙烯圆点的表面在核沸腾区域具有较高的换热性能，沸腾始于较低的表面过热度。实验还发现，在溶解周期气体的作用下，在沸点以下会产生气泡。

In order to disclose the characteristics of vapor film that can exist under high subcooled condition, experiments of pool boiling have been performed using superhydrophobic and PTFE spotted coatings. The results show that the surfaces with PTFE circle dots have higher heat transfer performance in nucleate boiling region and the boiling starts in lower surface superheating. It was also found that by the effect of dissolved periodic gas bubble generation can occur below boiling point.