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Critical heat flux of pool boiling on Si nanowire array-coated surfaces

机译:硅纳米线阵列涂层表面上沸腾池的临界热通量

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摘要

Pool boiling of saturated water on plain Si surfaces and surfaces covered with a dense array of Si nano-wires (SiNWs) has been studied. Measured CHF and heat transfer coefficient (HTC) values of about 223 ± 5.61 W/cm2 and 9 + 1.60 W/cm2 K, respectively, on the nanowire array-coated surface are among the highest reported in boiling heat transfer. Meanwhile, the CHFs on both nanowire-coated and Plain Si surfaces show a similar heater size dependence - the CHF increases as heater size decreases. The measured CHFs on both types of surfaces are approximately following the prediction of the hydrodynamic theory assuming the Helmholtz wavelength equal to the corresponded heater length. It suggests that the CHFs on both types of surfaces might be limited by pool hydrodynamics.
机译:已经研究了在纯Si表面和覆盖有密集的Si纳米线(SiNWs)的表面上饱和水的池沸腾现象。在沸腾传热中,测得的CHF和传热系数(HTC)值分别约为223±5.61 W / cm2和9 + 1.60 W / cm2 K,分别是最高的。同时,纳米线涂层和纯硅表面上的CHF都显示出相似的加热器尺寸依赖性-CHF随着加热器尺寸的减小而增加。假设亥姆霍兹波长等于相应的加热器长度,则在两种类型的表面上测得的CHF近似遵循流体力学理论的预测。这表明两种类型的表面上的CHF可能都受池流体动力学的限制。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2011年第26期|p.5359-5367|共9页
  • 作者单位

    Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan;

    Department of Mechanical and Aerospace Engineering, University of California at San Diego, CA 92093, USA;

    Department of Mechanical Engineering, University of California at Berkeley, CA 94720, USA;

    Department of Mechanical Engineering, University of California at Berkeley, CA 94720, USA;

    Department of Mechanical Engineering, University of California at Berkeley, CA 94720, USA,Advanced Research Projects Agency-Energy, Department of Energy, Washington DC 20585, 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

    pool boiling; critical heat flux; nanowires; hydrodynamics;

    机译:池沸腾临界热通量纳米线流体力学;

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