摘要
为探究流道缩扩比对半波纹微通道流动和传热特性的影响,设计了5种不同缩扩比的半波纹微通道模型,并对各通道内的层流流动(200<Re<1000,Re为雷诺数)和传热进行了数值模拟研究。结果表明,半波纹微通道的压降和努塞尔数随着流道缩扩比的减小而增大;与光滑微通道相比,半波纹微通道具有更优的传热性能但压降损失也更高;引入η作为综合性能指标,发现减小流道缩扩比是提高半波纹微通道综合换热能力的有效方式,且当Re>490时,其综合换热能力均优于光滑微通道。
In order to investigate the influence of divergent ratio on the flow and heat transfer characteristics of half-corrugated microchannel,five models of half-corrugated microchannel with different divergent ratio were designed,flow(200<Re<1000)and heat transfer behavior were researched by numerical simulation method,and the results were compared with smooth microchannel.The results show that the pressure drop and Nusselt number of half-corrugated microchannel increase with the decrease of the divergent ratio.Compared with smooth microchannel,half-corrugated microchannel has better heat transfer performance but higher pressure drop loss.By introducingηas the comprehensive performance index,it is found that reducing the divergent ratio is an effective way to improve the comprehensive heat transfer capacity of the half-corrugated microchannel.And when the Re>490,its comprehensive heat transfer capacity is better than that of smooth microchannel.
作者
曹卫华
张锁程
朱继元
孙文骏
CAO Weihua;ZHANG Suocheng;ZHU Jiyuan;SUN Wenjun(College of Mechanical and Control Engin.,Guilin University of Technology,Guilin 541004,CHN)
出处
《半导体光电》
CAS
北大核心
2023年第1期58-63,共6页
Semiconductor Optoelectronics
基金
国家自然科学基金项目(52075110,61961011)
关键词
流道缩扩比
半波纹微通道
流动特性
传热特性
divergent ratio
half-corrugated microchannel
flow characteristic
heat transfer characteristic
