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首页> 外文期刊>International Journal of Heat and Mass Transfer >Augmented heat transfer with intersecting rib in rectangular channels having different aspect ratios
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Augmented heat transfer with intersecting rib in rectangular channels having different aspect ratios

机译：具有不同纵横比的矩形通道中具有相交肋的增强传热

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摘要

This study was an experimental investigation of the effect of an intersecting rib on heat/mass transfer performance in rectangular channels with angled ribs and different aspect ratios. In a rib-roughened channel with angled ribs, heat/mass transfer performance deteriorates as the channel aspect ratio increases, since the vortices induced by angled ribs diminish with increasing aspect ratio. A longitudinal rib that bisects the angled ribs is suggested to overcome this disadvantage. The heat transfer performance of angled rib configurations with a 60° attack angle were tested with and without an intersecting rib using naphthalene sublimation method. The channel aspect ratio is varied from 1 to 4. When the intersecting rib was present, additional vortices were generated at every point of intersection with the angled ribs. Thus the heat/mass transfer performance was significantly enhanced for all channel aspect ratios when an intersecting rib was added to an ordinary angled rib configuration.
机译：这项研究是实验研究相交的肋骨对具有成角度的肋骨和不同纵横比的矩形通道中的传热/传质性能的影响。在具有成角度的肋的肋粗糙的通道中，随着通道的长宽比增加，热/质量传递性能变差，这是因为由成角度的肋引起的涡流随长宽比的增加而减小。建议将一等分的成角度的纵向肋条克服该缺点。使用萘升华方法，在有和没有交叉肋的情况下，测试了具有60°迎角的倾斜肋结构的传热性能。通道的宽高比在1到4之间变化。当存在相交的肋时，在与成角度的肋的每个相交点处都会产生其他涡旋。因此，当将相交的肋骨添加到普通的成角度的肋骨构造中时，对于所有通道的纵横比，传热/传质性能都得到了显着提高。

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  • 作者

    Heeyoon Chung; Jun Su Park; Sehjin Park; Seok Min Choi; Dong-Ho Rhee; Hyung Hee Cho;

  • 作者单位

    Departmental Mechanical Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea;

    Departmental Mechanical Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea;

    Departmental Mechanical Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea;

    Departmental Mechanical Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea;

    Korea Aerospace Research Institute, Eoeun-dong, Yuseong-gu, Daejeon 305-380, Republic of Korea;

    Departmental Mechanical Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul 120-749, 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

    Gas turbine; Internal cooling; Rib turbulator; Mass transfer; Naphthalene sublimation;

    机译：燃气轮机;内部冷却;肋湍流器传质;萘升华;

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