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Hydrodynamics and heat transfer of multiple droplets successively impacting on cylindrical surface

机译：圆柱形表面依次撞击多液滴的流体动力学和传热

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摘要

Based on the sparseness of research on the multi-droplet impact coupled with the anisotropy induced by cylindrical surface, in this paper, the hydrodynamics and heat transfer of multiple droplets successively impacting on cylindrical surface are deeply studied with three dimensional numerical simulation method. The comparison of single, two and even three droplets impacting on the heated cylindrical surface is carried out, and the effect of vertical space between successive droplets is discussed. Moreover, the influence of cylinder diameter on the hydrodynamics and heat transfer of multi-droplet impact is analyzed in detail. The results show that, the combination of multi-droplet interaction and anisotropy induced by cylindrical surface greatly affects the global heat flow, heat transfer coefficient, temperature distribution of liquid-vapor interface. By decreasing the vertical space between successive droplets impacting on the heated cylindrical surface, the heat transfer performance is obviously improved. Increasing the cylinder diameter boosts the heat transfer performance, but once the cylinder diameter augments to a certain value, the change of cylinder diameter no longer has an effect on the heat transfer performance, which is very close to the flat surface situation.
机译：基于对通过圆柱形表面引起的各向异性耦合的多液滴冲击的研究的稀疏性，在本文中，用三维数值模拟方法深入研究了多个液滴的流体动力学和传热。对撞击加热圆柱形表面的单个，两个甚至三滴的比较，讨论了连续液滴之间的垂直空间的效果。此外，详细分析了汽缸直径对多液体冲击流体动力学和传热的影响。结果表明，圆柱形表面诱导的多液滴相互作用和各向异性的组合极大地影响了全局热流，传热系数，液体蒸汽界面的温度分布。通过降低撞击对加热圆柱形表面的连续液滴之间的垂直空间，显然改善了传热性能。增加汽缸直径提高了传热性能，但是一旦气缸直径增加到一定的值，汽缸直径的变化不再对传热性能的影响，这非常接近平坦的表面情况。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第12期|121749.1-121749.14|共14页
  • 作者

    Jia Luo; Shuang-Ying Wu; Lan Xiao; Zhi-Li Chen;

  • 作者单位

    Key Laboratory of Low-grade Energy Utilization Technologies and Systems Ministry of Education Chongqing University Chongqing 400044 China;

    Key Laboratory of Low-grade Energy Utilization Technologies and Systems Ministry of Education Chongqing University Chongqing 400044 China School of Energy and Power Engineering Chongqing University Chongqing 400044 China;

    Key Laboratory of Low-grade Energy Utilization Technologies and Systems Ministry of Education Chongqing University Chongqing 400044 China School of Energy and Power Engineering Chongqing University Chongqing 400044 China;

    College of Environmental Science and Engineering Guilin University of Technology Guilin 541006 Guangxi China;

  • 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

    Multi-droplet impact; Heated cylindrical surface; Hydrodynamics and heat transfer; Vertical space; Cylinder diameter;

    机译：多滴冲击;加热圆柱形;流体动力学和传热;垂直空间;气缸直径;

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