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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical investigation of helical baffles heat exchanger with different Prandtl number fluids
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Numerical investigation of helical baffles heat exchanger with different Prandtl number fluids

机译：不同普朗特数流体螺旋折流板换热器的数值研究

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摘要

The numerical simulations for helical baffles heat exchanger with different Prandtl number (Pr) fluids and the comparison for helical baffles heat exchangers with different helical tilt angle (β) were presented in this paper. The results reveal that, the helical baffles are used to direct the shell side fluid flow spirally across the tubes, and the guide function will weaken when large Pr fluids involved. The heat transfer coefficient per unit length pressure drop decreases with the increase of heat exchanger length, and for heat exchangers with same length, the heat transfer coefficient per unit pressure drop increases with the increase of β. By comparing heat exchangers with same required heat transfer capacity, heat exchanger contained water as the shell side fluid achieves the best heat transfer performance when β is at 40°, and for shell side fluid with big Pr, the small angle scheme is the optimal selection.
机译：介绍了不同Prandtl数（Pr）流体的螺旋折流板换热器的数值模拟，以及不同螺旋倾角（β）的螺旋折流板换热器的比较。结果表明，螺旋折流板用于引导壳侧流体螺旋地流过管子，当包含大量Pr流体时，导向功能会减弱。单位长度压降的传热系数随着热交换器长度的增加而减小，对于相同长度的热交换器，单位压降的传热系数随着β的增大而增加。通过比较具有相同要求的传热能力的换热器，当β为40°时，作为壳侧流体的换热器具有最佳的传热性能；对于Pr大的壳侧流体，小角度方案是最佳选择。

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  • 作者

    Xiaoming Xiao; Luhong Zhang; Xingang Li; Bing Jiang; Xiaoling Yang; Youmei Xia;

  • 作者单位

    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China;

    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China;

    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China,National Engineering Research Center for Distillation Technology, Tianjin University, Tianjin, PR China;

    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China,National Engineering Research Center for Distillation Technology, Tianjin University, Tianjin, PR China;

    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China;

    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR 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

    Heat transfer; Helical baffles; Prandtl number; Numerical analysis; Simulation; Optimisation;

    机译：传播热量;螺旋形挡板普朗特编号数值分析;模拟;优化;

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