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中国科学院大学学报 ›› 2018, Vol. 35 ›› Issue (2): 240-247.DOI: 10.7523/j.issn.2095-6134.2018.02.014

• 中国工程热物理学会2016年传热年会专栏 • 上一篇    下一篇

涡发生器矩形通道内流动换热性能

唐凌虹1, 曾敏2   

  1. 1. 西安石油大学机械工程学院, 西安 710065;
    2. 西安交通大学热流科学与工程教育部重点实验室, 西安 710049
  • 收稿日期:2017-04-27 修回日期:2017-07-03 发布日期:2018-03-15
  • 通讯作者: 唐凌虹
  • 基金资助:
    陕西省教育厅科研计划项目(16JK1600)、西安石油大学青年科技创新基金(2015BS36)和教育部"新世纪优秀人才支持计划"项目(NCET-13-0463)资助

Flow and heat transfer characteristics in a rectangular channel with vortex generators

TANG Linghong1, ZENG Min2   

  1. 1. School of Mechanical Engineering, Xi'an Shiyou University, Xi'an 710065, China;
    2. Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, China
  • Received:2017-04-27 Revised:2017-07-03 Published:2018-03-15

摘要: 对布置不同结构形式纵向涡发生器的矩形通道内的流动换热性能进行数值研究,并与光通道进行比较。结果表明,涡发生器可强化流体的换热性能。应用场协同理论,对矩形通道内纵向涡发生器强化传热机理进行分析。在相同Re下,全场体积平均协同角较小的矩形通道对应的对流换热系数较大。以JF因子为比较准则,对矩形通道内综合流动换热性能进行比较,发现CFU式三角形翼纵向涡发生器与椭圆支柱组合能够提供最好的综合流动换热性能。

关键词: 矩形通道, 纵向涡发生器, 流动换热, 场协同理论

Abstract: In this study, effects of longitudinal vortex generator configurations (Case A-F) on the heat transfer and flow friction characteristics in a rectangular channel are investigated using numerical method. The results show that longitudinal vortex generator enhances the heat transfer performance, compared with the smooth channel. The field synergy principle analyses indicate that the intersection angles between velocity and temperature gradient of all longitudinal vortex generator configurations are smaller than that of smooth channel, and the comparison results show that at the same Reynolds number the smaller synergy angle the larger the Nusselt number is completely consistent with the field synergy principle. Comparisons of the performance evaluation parameter, JF factor, indicate that Case F has the best overall heat transfer performance and that Case F brings about more enhancement of heat transfer at a modest expense of the additional pressure. Therefore, Case F is a suitable configuration for enhancing the overall heat transfer performance for channels.

Key words: rectangular channel, longitudinal vortex generator, flow and heat transfer, field synergy principle

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