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首页> 外文期刊>International Journal of Heat and Mass Transfer >Effects of subcooling and two-phase inlet on flow boiling heat transfer and critical heat flux in a horizontal channel with one-sided and double-sided heating
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Effects of subcooling and two-phase inlet on flow boiling heat transfer and critical heat flux in a horizontal channel with one-sided and double-sided heating

机译：过冷和两相入口对单侧和双侧加热水平流道中沸腾传热和临界热通量的影响

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摘要

This study explores the influence of inlet subcooling and two-phase inlet on flow boiling heat transfer and critical heat flux in a horizontal 2.5-mm wide by 5-mm high rectangular channel for top wall heating, bottom wall heating and double-sided heating configurations using FC-72 as working fluid. High-speed video imaging is used to identify dominant interfacial characteristics for different combinations of inlet conditions and heating configurations. Three inlet conditions are compared: highly subcooled liquid, slightly subcooled liquid, and saturated two-phase mixture for mass velocities between 205.1 and 3211.6 kg/m~2 s. Gravity is shown having a dominant influence on interfacial behavior at low mass velocities below 400 kg/m~2 s, while inertia dwarfs gravity effects at high mass velocities around 1600 kg/m~2 s. Overall, CHF increases monotonically with increasing inlet subcooling. CHF variation between the three heating configurations is large for low mass velocities and diminishes for high mass velocities. A dimen-sionless parameter, heat utility ratio, is shown to be an effective means for assessing the influence of subcooling on CHF.
机译：这项研究探讨了进气过冷和两相进气对水平2.5毫米宽乘5毫米高矩形通道的流沸腾传热和临界热通量的影响，用于顶壁加热，底壁加热和双面加热配置使用FC-72作为工作流体。高速视频成像用于识别入口条件和加热配置的不同组合的主要界面特征。比较了三种入口条件：质量过速在205.1至3211.6 kg / m〜2 s之间的高度过冷液体，稍微过冷液体和饱和两相混合物。在低于400 kg / m〜2 s的低质量速度下，重力表现出对界面行为的主要影响，而在大约1600 kg / m〜2 s的高质量速度下，惯性使重力效应相形见war。总体而言，CHF随着入口过冷度的增加而单调增加。对于低质量速度，三种加热配置之间的CHF变化较大，而对于高质量速度，CHF变化减小。已显示出无因次参数热利用率是评估过冷对CHF影响的有效手段。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2015年第12期|1187-1205|共19页
  • 作者

    Chirag R. Kharangate; Lucas E. ONeill; Issam Mudawar; Mohammad M. Hasan; Henry K. Nahra; Ramaswamy Balasubramaniam; Nancy R. Hall; Ashley M. Macner; Jeffrey R. Mackey;

  • 作者单位

    Boiling and Two-Phase Flow Laboratory (BTPFL), School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907, USA;

    Boiling and Two-Phase Flow Laboratory (BTPFL), School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907, USA;

    Boiling and Two-Phase Flow Laboratory (BTPFL), School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907, USA;

    NASA Glenn Research Center. 21000 Brookpark Road. Cleveland, OH 44135, USA;

    NASA Glenn Research Center. 21000 Brookpark Road. Cleveland, OH 44135, USA;

    NASA Glenn Research Center. 21000 Brookpark Road. Cleveland, OH 44135, USA;

    NASA Glenn Research Center. 21000 Brookpark Road. Cleveland, OH 44135, USA;

    NASA Glenn Research Center. 21000 Brookpark Road. Cleveland, OH 44135, USA;

    Vantage Partners, 3000 Aerospace Parkway, Brook Park, OH 44142, 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

    Flow boiling; Critical heat flux; Subcooling; Two-phase inlet; Gravity effects;

    机译：流沸腾;临界热通量;过冷两相入口;重力效应;

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