基于功能梯度表面的微型热管换热性能研究  

Thermal Performance of a Micro Heat Pipe Based on Functional Surface

作　　者：屈健[1] 吴慧英[1] 郑平[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《电子器件》2008年第4期1373-1376,共4页Chinese Journal of Electron Devices

基　　金：教育部新世纪优秀人才支持计划(NCET-06-0406);上海市教委科研创新项目(08ZZ10)资助

摘　　要：通过将液固接触角沿轴向呈阶梯状分布的功能表面引入到三角形微型热管的一维稳态模型之中,分析了其对微型热管换热性能的影响。模拟结果表明较之常规表面,基于功能表面的微型热管能带走更多的热量。而产生这种结果的原因主要是由于功能表面能有效地提高微型热管内的毛细压差且不会造成摩擦阻力的明显变化。另外,对于传统表面还发现存在着最优接触角,此时微型热管的换热性能最佳,偏离该接触角会造成毛细压差的减小和热管换热性能的下降。Based on a 1-D steady-state model for a triangular micro heat pipe, the effect of a functional surface with the axial ladder contact angle distribution on the thermal performance of a micro heat pipe has been analyzed. The simulation results show that the micro heat pipe with the functional surface can remove a greater amount of heat than the traditional surface with the identical contact angle distribution on itself under the same condition. The increased thermal performance with respect to the functional surface can mainly be attributed to the increase of the liquid capillary force as well as the no obvious increase of the total shearing force provided by the phase interfaces. It is also found that for the traditional MHP with uniform contact angle surface, there is an optimal contact angle leading to the maximum heat input. The deviation of the optimal contact angle will reduce the capillary force and the thermal performance of the MHP.

关 键 词：微型热管 功能表面 毛细力 剪切力 

分 类 号：TQ051.5[化学工程]