朱崎峰, 常昆鹏, 薛东东,等.凹槽型微通道内液体流动换热特性的实验研究[J].河南理工大学学报（自然科学版）,2021,40(3):100-105.

ZHU QF, CHANG K P, XUE D D, et al.Experimental study on water flow and heat transfer characteristics inmicrochannel with grooves in sidewalls[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(3):100-105.

凹槽型微通道内液体流动换热特性的实验研究

朱崎峰, 常昆鹏, 薛东东, 李海霞, 万剑锋, 张安超

河南理工大学 机械与动力工程学院，河南 焦作454000

摘要:微通道热沉是解决微机电系统电子元器件冷却问题的有效途径。为提高微通道热沉的传热性能，设计2组不同水力直径的微通道热沉，分别在其流道壁面加工三角形凹槽和扇形凹槽。搭建微通道内液体单相流动与换热实验平台，以去离子水为流体介质，实验测试不同流量下微通道热沉的进出口液体压力、温度和加热面温度。以微通道流动压降、摩擦常数、加热面温度、努塞尔数和场协同数为评价标准，系统研究凹槽型微通道的流动和换热性能，结果表明：当水力直径相同时，扇形凹槽微通道内液体流动压降小于三角形凹槽微通道内的；当水力直径较小时，三角形凹槽微通道的换热性能优于扇形凹槽微通道的，水力直径较大时，扇形凹槽微 通道则具有更好的散热能力；当单个通道内流体速度小于1.12 m/s时，扇形凹槽微通道的综 合性能优于三角形凹槽微通道。

关键词:微通道热沉;传热;凹槽;场协同

doi:10.16186/j.cnki.1673-9787.2020010072

基金项目:国家自然科学基金资助项目（51676064）；河南省基础研究项目（15A470002）；河南省科技攻关项目（162012210067）

收稿日期:2020/01/29

修回日期:2020/05/21

出版日期:2021/05/15

Experimental study on water flow and heat transfer characteristics inmicrochannel with grooves in sidewalls

ZHU Qifeng, CHANG Kunpeng, XUE Dongdong, LI Haixia, WAN Jianfeng, ZHANG Anchao

School of Mechanical and Power Engineering， Henan Polytechnic University ，Jiaozuo 454000 ， Henan， China

Abstract:Microchannel heat sink is an effective approach to solve the cooling problem of electronic components for micro-electro-mechanical systems （ MEMS ） . In order to improve its thermal performance， two sets of microchannel heat sinks were designed with different hydraulic diameters and triangular-or fan-shaped grooves in channel sidewalls. An experimental platform for liquid flow and heat transfer in microchannels was built with deionized water as the fluid medium. The liquid pressure and temperature at inlet and outlet and the heating surface temperature were tested with different velocities. The flow and heat transfer performances of microchannel were experimentally studied with pressure drop， friction coefficient， heating surface temperature， average Nusselt number and field synergy number as evaluation criteria. The results showed that the pressure drop of the fan-shaped grooved microchannels was smaller than that of the triangular grooved ones for the same hydraulic diameter. When the hydraulic diameter was small， the heat transfer performance of the triangular grooved microchannel was better than that of the fan-shaped grooved microchannel. However， the fan-shaped grooved microchannel had better heat dissipation ability with the larger hydraulic diameter. When the fluid velocity was less than 1.12 m/s in a single channel， the overall performance of the fan-shaped grooved microchannels was better than that of the triangular grooved ones.

Key words:microchannel heat sink;heat transfer;groove;field synergy

 凹槽型微通道内液体流动换热特性的实验研究_朱崎峰.pdf