本文在不同压力状态下对水与酒精混合蒸汽在竖直管外Marangoni凝结换热特性进行了可视化实验研究,观测到不同过冷度下的凝结状态.实验结果表明,在相同流速和浓度条件下,酒精浓度较低时凝结换热系数随蒸汽压力的升高而升高.但在高酒精浓度下,凝结液表面张力梯度减小,扩散热阻的影响增大,蒸汽压力对于凝结换热系数的影响并不明显.
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