滴・膜共存凝縮伝熱面の熱伝達

概要

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Experiments were performed on heat transfer of various patterned sarfaces on which dropwise and filmwise condensation coexisted at adjacent positions to obtain condensation characteristics for each pattern over a wide range of surface subcooling. The effect of coexistence on the mechanism of the enhancement of heat transfer was discussed. The measured heat flux showed degradation in heat transfer in the dropwise condensation sections. On the other hand, the heat flux in the filmwise condensation sections was remarkably enlarged, comparing with that of whole filmwise condensation surfaces, due to a disturbance caused by rushing drops on the condensate film. It was also shown that there exists a suitable width in each section for enhancing condensation heat transfer in the filmwise parts by means of coexisting dropwise condensation parts.
社団法人日本機械学会の論文
1989-12-25