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首页> 外文期刊>International Journal of Heat and Mass Transfer >Heat transfer enhancement of wedge-shaped channels by replacing pin fins with Kagome lattice structures
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Heat transfer enhancement of wedge-shaped channels by replacing pin fins with Kagome lattice structures

机译：用kagome晶格结构用销钉用盖子形通道的传热增强

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摘要

This study introduces Kagome lattice structures to replace pin fins or ribs in a wedge-shaped channel, which represents a turbine-blade trailing edge, for heat transfer enhancement. Present simulation methods are verified against available experimental data. The local and overall thermo-fluidic characteristics of the four designed channels, at five Reynolds numbers and a given porosity, are investigated numerically and compared. The results reveal that the proposed structures exhibit 6-71% higher overall Nusselt numbers relative to the original structure but with similar pressure loss. The heat transfer enhancement is attributed to the fact that the first array of Kagome cores separates more high momentum fluid to the tip region, which results in the reduction of recirculation and increases convective heat transfer. (C) 2019 Elsevier Ltd. All rights reserved.
机译：本研究介绍了Kagome晶格结构，以将焊盘或肋代替楔形通道，该楔形通道代表涡轮叶片后缘，用于传热增强。目前的仿真方法验证了可用的实验数据。在数值和比较的五个雷诺数和给定孔隙的四个设计通道的局部和整体热流体特性。结果表明，所提出的结构相对于原始结构呈现6-71％的整体营养数，但具有相似的压力损失。传热增强归因于：第一克罗姆斯核阵列将更高的动量流体分离到尖端区域，这导致再循环的降低并增加对流热传递。 （c）2019 Elsevier Ltd.保留所有权利。

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  • 来源
  • 作者

    Shen Beibei; Li Yang; Yan Hongbin; Boetcher Sandra K. S.; Xie Gongnan;

  • 作者单位

    Northwestern Polytech Univ Sch Marine Sci & Technol POB 24 Xian 710072 Shaanxi Peoples R China;

    Northwestern Polytech Univ Sch Mech Engn Xian 710072 Shaanxi Peoples R China;

    Northwestern Polytech Univ Sch Marine Sci & Technol POB 24 Xian 710072 Shaanxi Peoples R China;

    Embry Riddle Aeronaut Univ Dept Mech Engn 600 S Clyde Morris Blvd Daytona Beach FL 32114 USA;

    Northwestern Polytech Univ Sch Marine Sci & Technol POB 24 Xian 710072 Shaanxi Peoples R China|Northwestern Polytech Univ Shenzhen Res & Dev Inst Shenzhen 518057 Peoples R China;

  • 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

    Trailing edge; Kagome cores; Pin fins; Flow characteristics; Heat transfer enhancement;

    机译：后缘;kagome核心;钉鳍;流动特性;传热增强;

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