恒壁温下矩形微通道热沉换热特性分析  

Heat transfer characteristic in rectangular micro-channel heat sinks with constant wall temperature

作　　者：袁嘉隆 梁杰[1] 林雄萍[1] 郑捷庆[1] 

机构地区：[1]福建省清洁燃烧与能源高效利用工程技术研究中心(集美大学),福建厦门361021

出　　处：《化学工程》2015年第4期29-34,共6页Chemical Engineering(China)

基　　金：福建省科技计划重点项目(2012H0031);福建省自然科学基金资助项目(2009J01261);福建省科技厅高校专项(JK2011028)

摘　　要：建立了恒壁温条件下矩形硅微通道热沉的三维模型,对微通道内单相层流的换热和流动特性进行了数值模拟研究,分析结果表明:沿流动方向,热沉流体域的温度梯度大于固体域的温度梯度,且最大的温度梯度出现在入口段;除恒温热沉顶面外,通道顶面的温度最大,通道底面和热沉底面的温度近似趋于定值。通道内的换热研究发现,通道侧壁面的Nu数最大,顶面与底面相差很小,角落处的Nu数趋近于0。A three-dimensional heat transfer in a rectangular micro-channel heat sink with constant wall temperature was analyzed numerically. The simulation results indicate that the temperature gradient in the solid region is smaller than that in the fluid region and the highest temperature gradient appears at the channel inlet. Except for the heat sink top wall, the channel top wall has the highest temperature and the channel bottom wall and heat sink bottom wall can be approximated as constant. The result shows that channel side wall has the highest Nusselt number, with less difference between channel top wall and channel bottom wall, approaching zero in the corners.

关 键 词：矩形微通道 传热 压降 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]