文章基本信息

标题：Numerical study on subcooled water jet impingement cooling on superheated surfaces
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作者：Joo Hyun Moon ; Soyeong Lee ; Jungho Lee 等
期刊名称：Case Studies in Thermal Engineering
印刷版ISSN：2214-157X
电子版ISSN：2214-157X
出版年度：2022
卷号：32
页码：101883
语种：English
出版社：Elsevier B.V.
摘要：The present study aims to numerically investigate the rapid cooling heat transfer characteristics of the superheated solid surfaces when the subcooled water jet impinges. The computational fluid dynamics (CFD) simulation was carried out by considering boiling and condensation heat transfer to estimate key design parameters such as wall heat flux, heat transfer coefficient, and surface temperature variation using the volume-of-fluid (VOF) model. The simulated results agreed well with the experimental data of the surface temperature and the wall heat flux at the stagnation point. The water vapors formed near the stagnation point and rapidly propagated radially after impact. Also, strong vorticity was found in a radial direction, resulting in a vapor blanket. The result showed that the vapor blanket prevented the liquid flows from directly contacting the heated surface, decreasing the heat transfer. In particular, the surface temperature in the radial direction cooled down more rapidly than that in the vertical direction because of higher boiling heat transfer within a wetting radius where the heat transfer coefficient became higher owing to the liquid wetting.
关键词：Computational fluid dynamics Subcooled water jet impingement Heat flux Boiling