平板微通道流动传热的粗糙元间距效应  

The Effects of Space Between Roughness on Flow and Heat Transfer in Flat Microchannels

作　　者：云和明[1,2] 郭桄宇[3] 刘智[4] 

机构地区：[1]山东建筑大学可再生能源建筑利用技术省部共建教育部重点实验室,山东济南250101 [2]山东建筑大学山东省建筑节能技术重点实验室,山东济南250101 [3]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [4]山东建筑大学热能学院,山东济南250101

出　　处：《机械设计与制造》2013年第5期117-119,共3页Machinery Design & Manufacture

基　　金：山东省自然基金(ZR2010EM06);山东建筑大学博士基金(824008)

摘　　要：微细尺度传热问题业已成为国际传热界的研究点,而壁面粗糙度对微细通道流动和传热特性有着重要影响。以粗糙平行平板微通道为研究对象,用三角形粗糙元模拟固体表面的粗糙度,通过采用CFD(computational fluid dynamics)流体固体共轭传热技术数值研究了粗糙元间距对平行平板微通道流动和传热特性的影响规律,同时研究了其间距对微通道流动的转捩雷诺数的影响规律;计算结果表明:随着三角形粗糙元间距的增大,粗糙平板微通道的阻力性能逐渐下降,层流向湍流转捩的雷诺数呈逐渐增大趋势,同时粗糙平板微通道的传热性能呈逐渐下降趋势。The microscale and miniscale heat transfer has become the research hotspot of international heat transfer area,and the flow and heat transfer characteristics in microchannels and minichannels has been mostly affected by surface roughness.The influence of space between roughness cells on flow and heat transfer in paralleled flat microchannels is investigated with a triangular toothed roughness cell as surface roughness of solid by using fluid-solid conjugate heat transfer technologies and CFD（computational fluid dynamics） methods.The influence law of space between roughness cell on critical Reynolds numbers is also studied in this paper;The computational results indicats that the resistance and the heat transfer characteristics of microchannels become descend with the space between of surface roughness increscent.

关 键 词：平板微通道 粗糙元 共轭传热 CFD 

分 类 号：TH16[机械工程—机械制造及自动化] TK124[动力工程及工程热物理—工程热物理]