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›› 2007, Vol. 7 ›› Issue (3): 472-475.

• 流动与传递 • 上一篇    下一篇

分割表面对蒸汽滴状冷凝传热特性的影响

马学虎,宋天一,兰忠,周兴东   

  1. 大连理工大学化学工程研究所
  • 出版日期:2007-06-20 发布日期:2007-06-20

The Effect of Dividing Surface on Heat Transfer Characteristics of Dropwise Condensation

MA Xue-hu,SONG Tian-yi,LAN Zhong,ZHOU Xing-dong   

  1. Institute of Chemical Engineering, Dalian University of Technology
  • Online:2007-06-20 Published:2007-06-20

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被引次数

18

摘要： 实验测定了相同操作条件下涂层表面1:1分割前后水蒸汽冷凝传热通量与表面过冷度的关系，对分割表面上滴膜共存冷凝进行了研究，结果表明，分割表面上滴膜共存时的热通量比全部为滴状和膜状冷凝表面热通量的平均值大，且其差值随处理表面上接触角的增大而增大. 从固液界面效应的角度对该现象进行了分析，并解释了其原因.

关键词: 滴膜共存冷凝, 界面效应, 分割表面, 强化传热

Abstract: The relations of water vapor condensation heat fluxes with surface subcoolings on coated surfaces were determined experimentally, and the experimental results with and without dividing surfaces with the ratio of 1:1 were also compared. It was observed that the heat fluxes of dropwise-filmwise coexisting condensations (DFC) on dividing surfaces were more than the mean fluxes of pure dropwise and filmwise condensations (MDF) on coated and bare surfaces, respectively, and the differences between them increased with increasing the contact angles on the coated surfaces. The phenomenon was explained from the point of view of interfacial energy effect of condensate and solid.

Key words: dropwise-filmwise coexisting condensation, interfacial energy effect, dividing surface, heat transfer enhancement