化工进展 ›› 2017, Vol. 36 ›› Issue (12): 4329-4342.DOI: 10.16085/j.issn.1000-6613.2017-0682

• 化工过程与装备 • 上一篇    下一篇

自湿润流体的流动与传热特性研究进展

胡艳鑫1, 黄凯鑫1, 陈思旭1, 汪双凤2, 黄金1   

  1. 1 广东工业大学材料与能源学院, 广东 广州 510640;
    2 华南理工大学化学与化工学院, 广东 广州 510640
  • 收稿日期:2017-04-18 修回日期:2017-04-18 出版日期:2017-12-05 发布日期:2017-12-05
  • 通讯作者: 黄金,教授,研究方向为传热传质领域。
  • 作者简介:胡艳鑫(1986-),男,讲师,研究方向为强化沸腾传热。E-mail:huyanxin825@126.com。
  • 基金资助:
    国家自然科学基金(51476038)、广东省前沿与关键技术创新专项资金项目(2016A050503042)、广州市科技计划产学研协同创新重大专项(2016201604030020)及广州市科技计划产学研协同创新重大专项项目(201704030009)。

Research progress of flow and heat transfer characteristics with self-rewetting fluid

HU Yanxin1, HUANG Kaixin1, CHEN Sixu1, WANG Shuangfeng2, HUANG Jin1   

  1. 1 School of Materials and Energy, Guangdong University of Technology, Guangzhou 510640, Guangdong, China;
    2 School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2017-04-18 Revised:2017-04-18 Online:2017-12-05 Published:2017-12-05

摘要: 自湿润流体是指某些具有自发润湿高温端特性的非共沸的混合溶液。这类溶液各组分的沸点不同,易挥发的组分优先发生沸腾,优先沸腾的组分在气液界面引起组分浓度梯度,再由组分的浓度梯度引起表面张力梯度;同时在气液界面产生温度梯度即热毛细作用也引起了表面张力梯度。由于受到双重表面张力梯度的影响,该溶液高温区域与低温区域之间产生了一股较大的推动力,从而使液体自发地向高温区域流动,湿润烧干部位,增强了沸腾传热。本文对自湿润流体流动与传热特性的相关研究现状及发展动态进行综述,首先详细介绍了单组分流体以及多组分流体强化传热的机理,并进一步介绍了自湿润流体的传热机理。然后对自湿润流体的制备以及自湿润流体的流动与传热特性等进行描述。最后综述了自湿润流体在无毛细芯结构、不同倾斜角下、微重力条件下以及其他类型的热管中的应用。

关键词: 自湿润流体, 传热机理, Marangoni作用, 表面张力, 可视化研究

Abstract: Self-rewetting fluid is the non-azeotropic solutions satisfied to enjoy a particular surface tension behavior-an increase in the surface tension with increasing temperature. In the case of non-azeotropic compositions,preferential evaporation of more volatile component takes place. Preferential evaporation results in a composition gradient along the liquid/vapor interface,and the surface tension gradient due to the composition gradient induces Marangoni flow that is expected to enhance boiling heat transfer. Moreover,due to the particular surface tension behavior,the thermocapillary effect induces a liquid inflow to the bubble-heater contact area,which induce the liquid spontaneously move to the high temperature dry out region. In this paper,the researches on the flow and heat transfer characteristics of the self-rewetting fluids in the recent decades were summarized,mainly including heat transfer mechanism of the single component fluids,multi component fluids and self-rewetting fluids,the preparation of self-rewetting fluid and flow and heat transfer characteristics of self-rewetting fluid. Furthermore,the applications of self-rewetting fluid in wickless structure,different angles of inclination,microgravity conditions and different types of heat pipes were introduced in detail.

Key words: self-rewetting fluid, heat transfer mechanism, Marangoni effect, surface tension, visualization

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