doi:10.16186/j.cnki.1673-9787.2020010072

Received:2020/01/29

Revised:2020/05/21

Published: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