等壁温下平行微通道内层流换热的数值模拟  

Numerical simulation of laminar heat transfer of equal wall temperature in parallel micro channel

作　　者：李彩霞[1,2] 王斯民[1] 胡鹏睿[2] 

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049 [2]陕西科技大学机电工程学院,陕西西安710021

出　　处：《化学工程》2012年第3期22-24,29,共4页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(51106119);教育部博士点基金资助项目(20090201120003);中央高校基本科研业务费专项基金资助项目

摘　　要：采用数值仿真的方法,模拟了矩形微通道内层流流动换热过程,使用的工质为去离子水。模拟结果揭示了以下结论:矩形微通道侧面的面积热阻会显著随流速而变化,在整体范围内,面积热阻会随流速的增加而减小,且减小的幅度会越来越小。微通道内流体流速的设置还因考虑到泵的承受能力,若流速过高,对泵性能的要求也会提高,因此流速的设置要综合考虑面积热阻和泵的性能。微通道的横截面积尺寸对微通道性能的影响不大。当微通道长宽比为1时,阻力系数最小。The process of laminar flow and heat transfer inside the rectangular micro channel unit was numerically stimulated with the deionized water as working fluid.The result proves that the speed of flow has the influence on the area thermal resistance of the rectangular micro channel.As the speed of flow increases,the area thermal resistance of the rectangular micro channel reduces;when the speed of flow further increases,the temperature difference and the area thermal resistance reduce slowly.Increasing the speed of flow requests the higher performance for pump output,therefore the design of the flow speed in the micro channel should consider the area thermal resistance and the performance of pump.The cross area size of micro channel has a little influence on the micro channel performance.When the ratio of length to breadth of micro channel is 1,the resistance coefficient is the least.

关 键 词：等壁温 平行微通道 层流流动 面积热阻 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]