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Wall heat flux partitioning during subcooled forced flow film boiling of water on a vertical surface

机译:在垂直表面过冷强制流膜沸腾期间壁热通量分配

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摘要

Subcooled flow film boiling experiments were conducted on a vertical flat plate, 30.5 cm in height, and 3.175 cm wide with forced convective upflow of subcooled water at atmospheric pressure. Data have been obtained for mass fluxes ranging from 0 to 700 kg/m~2s, inlet subcoolings ranging from 0 to 25 ℃ and wall superheats ranging from 200 to 400 ℃. Correlations for wall heat transfer coefficient and wall heat flux partitioning were developed as part of this work. These correlations derive their support from simultaneous measurements of the wall heat flux, fluid temperature profiles, liquid side heat flux and interfacial wave behavior during steady state flow film boiling. A new correlation for the film collapse temperature was also deduced by considering the limiting case of heat flux to the subcooled liquid being equal to the wall heat flux. The premise of this deduction is that film collapse under subcooled conditions occurs when there is no net vapor generation. These correlations have also been compared with the data and correlations available in the literature.
机译:在高度为30.5厘米,宽为3.175厘米的垂直平板上进行过冷流膜沸腾实验,并在大气压下将过冷水强制对流向上流动。已获得质量流量为0至700 kg / m〜2s,入口过冷度为0至25℃,壁过热度为200至400℃的数据。墙壁传热系数和墙壁热通量分配的相关性是这项工作的一部分。这些相关性来自对稳态流膜沸腾过程中壁热通量,流体温度曲线,液体侧热通量和界面波行为的同时测量而获得的支持。通过考虑到过冷液体的热通量的极限情况等于壁的热通量,还推导了膜塌陷温度的新关系。该推论的前提是,在没有净蒸汽产生的情况下,在过冷条件下会发生膜破裂。这些相关性也已经与文献中的数据和相关性进行了比较。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2009年第16期|3534-3546|共13页
  • 作者单位

    Mechanical and Aerospace Engineering Department, Henri Samueli School of Engineering and Applied Science, University of California, Los Angeles, CA 90095, USA;

    Mechanical and Aerospace Engineering Department, Henri Samueli School of Engineering and Applied Science, University of California, Los Angeles, CA 90095, USA;

    Mechanical and Aerospace Engineering Department, Henri Samueli School of Engineering and Applied Science, University of California, Los Angeles, CA 90095, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    subcooled flow film boiling; wall heat flux partitioning;

    机译:过冷流动膜沸腾;壁热通量分配;

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