流体横掠方形微针肋阵列热沉的传热特性  

HEAT TRANSFER CHARACTERISTICS OF A DIAMOND-SHAPED PIN FIN MICRO HEAT SINK

作　　者：夏国栋[1] 李宴君[1] 孔凡金[1] 

机构地区：[1]传热强化与过程节能教育部重点实验室及传热与能源利用北京市重点实验室,北京工业大学,北京100022

出　　处：《工程热物理学报》2008年第4期628-630,共3页Journal of Engineering Thermophysics

基　　金：北京市教育委员会科技计划重点项目(No．KZ200710005001);国家自然科学基金项目(No．50476035);北京市自然科学基金项目(No．3052004);教育部博士点学科专项科研基金项目(No．20070005009)

摘　　要：本文以去离子水为冷却工质,对流体横向冲刷方形微针肋阵列热沉的传热特性进行了实验研究.结果表明流体横掠微针肋热沉具有优越的换热特性。实验得出,冷却液的雷诺数对热沉的换热性能影响显著;总热阻随着泵功的增大而降低;对流换热热阻在总热阻中所占比例较小,流体吸热焓变热阻成为影响热沉性能的主导因素.Heat transfer characteristics associated with the forced flow of de-ionized water over diamond shaped micro pin-fin bundles have been experimentally investigated. It is shown that the forced convection over micro pin fin heat sinks is a very effective heat transfer mode. The dependence of the Nusselt number on the Reynolds number is considerably notable. The total thermal resistance decreases with the increasing pumping power. Compared with the convection thermal resistance, thermal resistance due to the increase in liquid temperature has more significant effect on the performance of the micro heat sink.

关 键 词：微针肋 传热特性 横掠 热沉 

分 类 号：TK124[动力工程及工程热物理—工程热物理]