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首页> 外文期刊>Journal of Heat Transfer >High Rotation Number Effect on Heat Transfer in a Triangular Channel With 45 cleg, Inverted 45 deg, and 90 deg Ribs
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High Rotation Number Effect on Heat Transfer in a Triangular Channel With 45 cleg, Inverted 45 deg, and 90 deg Ribs

机译：高旋转数对具有45斜角，倒45度和90度肋的三角通道中的传热的影响

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摘要

Heat transfer and pressure drop have been experimentally investigated in an equilateral triangular channel (D_h = 1.83 cm), which can be used to simulate the internal cooling passage near the leading edge of a gas turbine blade. Three different rib configurations (45 deg, inverted 45 deg, and 90 deg) were tested at four different Reynolds numbers (10,000-40,000), each with five different rotational speeds (0-400 rpm). The rib pitch-to-height (P/e) ratio is 8 and the height-to-hydraulic diameter (e/D_h) ratio is 0.087 for every rib configuration. The rotation number and buoyancy parameter achieved in this study were 0-0.58 and 0-2.3, respectively. Both the rotation number and buoyancy parameter have been correlated with predict the rotational heat transfer in the ribbed equilateral triangular channel. For the stationary condition, staggered 45 deg angled ribs show the highest heat transfer enhancement. However, staggered 45 deg angled ribs and 90 deg ribs have the higher comparable heat transfer enhancement at rotating condition near the blade leading edge region.
机译：已经在等边三角形通道（D_h = 1.83 cm）中对传热和压降进行了实验研究，该通道可用于模拟燃气轮机叶片前缘附近的内部冷却通道。在四个不同的雷诺数（10,000-40,000）下测试了三种不同的肋结构（45度，倒置45度和90度），每种具有五种不同的转速（0-400 rpm）。对于每种肋构造，肋的螺距与高度（P / e）之比为8，而高度与液压直径（e / D_h）之比为0.087。在这项研究中获得的转数和浮力参数分别为0-0.58和0-2.3。转数和浮力参数都已与预测肋状等边三角形通道中的旋转热传递相关。对于静止状态，交错的45度成角度的肋骨显示出最高的传热效果。但是，交错的45度角肋和90度肋在叶片前缘区域附近的旋转条件下具有更高的可比传热增强。

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  • 来源
    《Journal of Heat Transfer》 |2010年第7期|P.071702.1-071702.10|共10页
  • 作者

    Yao-Hsien Liu; Michael Huh; Je-Chin Han; Hee-Koo Moon;

  • 作者单位

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

    rnDepartment of Mechanical Engineering,University of Texas at Tyler,Tyler, TX 75799;

    rnDepartment of Mechanical Engineering,Turbine Heat Transfer Laboratory,Texas A&M University,College Station,TX 77843-3123;

    rnSolar Turbines Inc.,San Diego, CA 92186;

  • 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

    heat transfer; turbulence promoter; triangular channel; high rotation number;

    机译：传播热量;湍流促进剂三角通道高转数;

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