摘要
本文以去离子水为冷却工质,对流体横掠当量直径为90～200μm的圆形微针肋阵列热沉的流动与传热特性进行了实验研究。实验数据显示:对于叉排实验件热沉,摩擦阻力系数对雷诺数的依变关系在Re=100前后发生转变;端壁效应、高径比和布置方式对摩擦阻力系数有很大影响;努塞尔特数随雷诺数的增大显著增大,其依变关系在双对数坐标下呈现较好的线性关系。
Flow and Heat Transfer Characteristics associated with the forced flow of de-ionized water over circular shaped micro pin-fin bundles with diameters ranging from 90 μm to 200 μm were experi- mentally investigated in the paper. To staggered micro pin-fin heat sinks, the variation of the friction factor with the Reynolds number shows a transition around Re=100. Density and arrangement of pin fins have strong effects on the friction factor. The experimental Nusselt number obviously increases with increasing Reynolds number, and their relation shows a good linear relation in double logarithm coordinate system.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第4期621-624,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金项目(No.50876003)
北京市教育委员会科技计划重点项目(No.KZ200710005001)
北京市自然科学基金项目(No.3092009)
教育部博士点学科专项科研基金项目(No.20070005009)
关键词
微针肋
流动特性
传热特性数
micro pin fin
flow characteristics
heat transfer characteristics
