吉首大学学报(自然科学版)

• 物理 • 上一篇    下一篇

微槽群结构对微纳复合表面汽泡周期的影响

戴新龙,叶伏秋,胡学功,周文斌,栾义军,于樱迎,唐瑾晨   

  1. (1.吉首大学物理与机电工程学院,湖南 吉首 416000;2.中国科学院工程热物理研究所,北京 100190)
  • 出版日期:2017-07-25 发布日期:2017-08-01
  • 通讯作者: 叶伏秋(1967—),男,湖南益阳人,吉首大学物理与机电工程学院副教授.
  • 作者简介:戴新龙(1990—),男,山东济宁人,硕士,主要从事微纳复合结构表面的换热研究
  • 基金资助:

    国家自然科学基金资助项目(51376178)

Effects of Microgrooves Structure on Bubble Period on Surfaces with Micro-Nano Composite Structure

DAI Xinlong,YE Fuqiu,HU Xuegong,ZHOU Wenbin,LUAN Yijun,YU Yingying,TANG Jinchen   

  1. (1.College of Physics and Electromechanical Engineering,Jishou University,Jishou 416000,Hunan China;2.Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China)
  • Online:2017-07-25 Published:2017-08-01

摘要:

将涂有250 nm钛纳米涂层,且具有不同微尺度结构的微槽群竖直放置,采用高速摄影技术对热沉中的汽泡周期进行可视化研究.研究结果表明:当热流密度较小时,汽泡周期随着微槽深宽比的增加而减小;随热流密度的增大,汽泡周期逐渐减小;微尺度效应对汽泡周期的影响随着热流密度的增加而减弱.

关键词: 微尺度效应, 微纳复合结构, 汽泡周期, 等待时间

Abstract:

The visualization study of the period of bubble behavior in the microgroove heat sinks was implemented by high speed photography technique.The microgroove plates were vertically placed and coated with 250 nm titanium nano coating to generate micro-nano composite structure surface.The results showed that when the heat flux density was small,the bubble period decreased with the increase of micro groove depth-width ratio;with the increase of heat flux density,bubble period decreased,and the micro-scale effect on bubble period was weaken as well.

Key words: micro-scale effect, micro-nano composite structure, bubble period, waiting time

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