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发表时间：2014-01-01

发表刊物：工程热物理学报

所属单位：化工学院

卷号：35

期号：8

页面范围：1624-1628

ISSN号：0253-231X

摘要：Infrared thermography was used to record the distribution and evolution
   of surface temperature field during droplet coalescence on the
   hydrophobic surface. The surface temperature distribution of droplet in
   different size was further analyzed on the base of temperature evolution
   during the droplet coalescence process. The measurements evidenced the
   periodic condensation of steam on the large droplet through four stages
   during droplet coalescence which was different from the successive
   condensation of steam on the small droplet. A balance between the heat
   release stage of steam condensation and the heat transfer stage from
   condensate to condensing surface given rise to a general law that the
   surface temperature increased with the increase of droplet size for high
   heat flux where the heat release of steam condensation dominated but
   decreased with the increase of droplet size for low heat flux where the
   heat transfer from condensate to condensing surface dominated. The
   direct condensation of steam on the large droplet can be promoted by the
   droplet movement, which provides an innovative approach to the
   condensation heat transfer enhancement of low pressure steam.

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