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首页> 外文期刊>Journal of Heat Transfer >Numerical Study of Turbulent Flow and Convective Heat Transfer Characteristics in Helical Rectangular Ducts
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Numerical Study of Turbulent Flow and Convective Heat Transfer Characteristics in Helical Rectangular Ducts

机译：螺旋矩形管道内湍流和对流换热特性的数值研究

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摘要

Three-dimensional turbulent forced convective heat transfer and its flow characteristics in helical rectangular ducts are simulated using SST k-ω turbulence model. The velocity field and temperature field at different axial locations along the axial direction are analyzed for different inlet Reynolds numbers, different curvatures, and torsions. The causes of heat transfer differences between the inner and outer wall of the helical rectangular ducts are discussed as well as the differences between helical and straight duct. A secondary flow is generated due to the centrifugal effect between the inner and outer walls. For the present study, the flow and thermal field become periodic after the first turn. It is found that Reynolds number can enhance the overall heat transfer. Instead, torsion and curvature change the overall heat transfer slightly. But the aspect ratio of the rectangular cross section can significantly affect heat transfer coefficient.
机译：利用SSTk-ω湍流模型模拟了三维湍流强迫对流换热及其在螺旋矩形管道中的流动特性。针对不同的入口雷诺数，不同的曲率和扭转，分析了沿轴向不同轴向位置处的速度场和温度场。讨论了矩形矩形螺旋管的内，外壁之间传热差异的原因，以及螺旋形与直管之间的传热差异。由于内壁和外壁之间的离心作用，产生了二次流。对于本研究，在第一圈之后，流场和热场变成周期性的。发现雷诺数可以增强整体传热。取而代之的是，扭转和曲率会稍微改变整体的热传递。但是矩形截面的纵横比会显着影响传热系数。

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  • 来源
    《Journal of Heat Transfer》 |2014年第12期|121701.1-121701.6|共6页
  • 作者

    Yunfei Xing; Fengquan Zhong; Xinyu Zhang;

  • 作者单位

    State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;

    State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;

    State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, 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

    helical rectangular duct; heat transfer; turbulent flow; curvature; torsion;

    机译：螺旋矩形风管传播热量;湍流;曲率扭力;

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