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首页> 外文期刊>Journal of Heat Transfer >Utilization of Pore-Size Distributions to Predict Thermophysical Properties and Performance of Biporous Wick Evaporators
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Utilization of Pore-Size Distributions to Predict Thermophysical Properties and Performance of Biporous Wick Evaporators

机译：利用孔径分布预测双孔棉芯蒸发器的热物理性质和性能

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摘要

A sintered copper porous medium is an extremely effective structure used to enhance the evaporative heat transfer properties of a heat pipe. It provides both capillary pressure to passively draw liquid in and increased surface area to more effectively heat the liquid. A biporous wick is particularly effective for this application as there are two distinct size distributions of pores; small pores to provide ample capillary pressure to drive flow through the wick and large pores to provide high permeability for escaping vapor. The modeling described in this work is based on the work of Kovalev who used a pore size distribution in order to determine the most probable liquid saturation at a given position. The model distinguishes phases by choosing a "cutoff' pore size, where larger pores were assumed to be filled with vapor and smaller pores were assumed to be filled with liquid. For a given thickness and thermophysical properties of the liquid, this 1-D model predicts the temperature difference across the wick for a given input power. The modeling proposed in this work yielded results that compare very well with experimental data collected on biporous evaporators by Semenic.
机译：烧结铜多孔介质是用于增强热管的蒸发传热性能的极其有效的结构。它既提供毛细管压力以被动地吸入液体，又提供更大的表面积以更有效地加热液体。双孔芯对于这种应用特别有效，因为存在两种不同的孔尺寸分布。小孔可提供足够的毛细压力以驱动流体通过油芯，而大孔可提供高渗透性以逃逸蒸汽。这项工作中描述的建模基于Kovalev的工作，他使用孔径分布来确定给定位置上最可能的液体饱和度。该模型通过选择“截断”孔径来区分相，其中假定较大的孔充满蒸汽，而较小的孔假定充满液体。对于给定的液体厚度和热物理性质，此一维模型在给定的输入功率下，可以预测芯子上的温差，这项工作中提出的模型产生的结果与精液公司在双孔蒸发器上收集的实验数据进行了很好的比较。

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  • 来源
    《Journal of Heat Transfer》 |2014年第6期|061501.1-061501.10|共10页
  • 作者

    Sean W. Reilly; Ivan Catton;

  • 作者单位

    Mechanical and Aerospace Engineering Department, University of California, Los Angeles, Los Angeles, CA 91101;

    Mechanical and Aerospace Engineering Department, University of California, Los Angeles, Los Angeles, CA 91101;

  • 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

    biporous wicks; evaporation heat transfer; porous media;

    机译：双孔灯芯蒸发传热多孔介质;

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