实验研究了湿空气掠过普通铝箔、亲水铝箔以及浸油处理后的坚直冷表面凝结时的显热和潜热传递,结果表明:湿空气凝结速率不高时,亲水表面上的凝结液更易于铺展,质量传递性能较好,比易于成珠的普通表面传热性能好.油污的存在增加了亲水表面质量传递和热量传递的阻力,但对普通表面的影响很小;较低的凝结速率使凝结液流动复杂化,流态由重力和表面张力共同作用,因此传热和传质的类比与膜状凝结理论值相差较大;凝结液呈现不规则液滴凝结,生长以及聚合现象.
参考文献
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