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首页> 外文期刊>International Journal of Heat and Mass Transfer >Thermal performance improvement of a radial heat sink with a hollow cylinder for LED downlight applications
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Thermal performance improvement of a radial heat sink with a hollow cylinder for LED downlight applications

机译：用于LED筒灯应用的带有空心圆柱的径向散热器的热性能改进

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摘要

A cooling system consisting of a hollow cylinder and a radial heat sink that can be applied to a light-emitting diode (LED) downlight is suggested. Natural convection heat transfer is simulated via a numerical model and validated experimentally. The airflow pattern around the radial heat sink is similar to that of a chimney, entering from the side of the heat sink and moving upward. When the hollow cylinder is installed, the mass flow rate of air to the heat sink fins increases, which results in enhanced thermal performance of the heat sink. The effect of the size, set up height and material of the hollow cylinder is analyzed, and the performance of heat sinks with various fin-types is calculated. The results show that the thermal performance of a radial heat sink is enhanced by up to 43% following installation of a hollow cylinder.
机译：建议使用由空心圆柱体和径向散热器组成的冷却系统，该系统可应用于发光二极管（LED）筒灯。自然对流换热通过数值模型进行模拟并通过实验验证。径向散热器周围的气流模式类似于烟囱，从散热器的侧面进入并向上移动。当安装中空圆柱体时，流向散热片的空气的质量流量增加，这导致了散热片的热性能增强。分析了空心圆柱体的尺寸，安装高度和材料的影响，并计算了各种鳍片式散热器的性能。结果表明，安装空心圆柱体后，径向散热器的热性能提高了43％。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2015年第10期|1184-1189|共6页
  • 作者

    Seung-Jae Park; Daeseok Jang; Kwan-Soo Lee;

  • 作者单位

    School of Mechanical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, Republic of Korea;

    School of Mechanical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, Republic of Korea;

    School of Mechanical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, Republic of Korea;

  • 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

    LED cooling; Radial heat sink; Hollow cylinder; Natural convection;

    机译：LED散热;径向散热器;空心缸;自然对流;

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