高效微射流阵列冷却热沉传热特性  

A INVESTIGATION ON HEAT TRANSFER IN A MICRO-JET IMPINGEMENT COOLING HEAT SINK

作　　者：张忠江[1] 夏国栋[1] 马晓雁[1] 齐景智[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》2007年第3期448-450,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.50476035);北京市自然科学基金(No.3052004);北京市教委科技发展项目(No.KM200410005008)

摘　　要：微射流阵列冷却热沉是利用射流冲击在驻点区能产生很薄的边界层来提高换热效率,本次研究设计的热沉是5层结构的模块式铜微射流阵列冷却热沉,以去离子水为工质对传热特性进行了实验研究。结果表明,采用微射流阵列冷却不仅能通过增加驻点数目来强化换热,而且能有效地降低换热表面的温差。热沉的热阻会随着泵功的增加而降低;随着泵功的不断提高,热阻变化趋于平缓。Micro-jet impingement cooling heat sink is used to enhance heat transfer owing to the very thin hydrodynamic and thermal boundary layers in the impingement region when a jet impinges on a surface. A copper micro-jet impingement cooling heat sink consisting of five copper sheets is designed in this paper and the jet diameter is 0.150 ram. Experiments are conducted to investigate the character of heat transfer in the heat sink with de-ionized water. The experiment results indicated that adopt micro-jet arraying cooling is not only strengthen heat transfer by increasing the number of stay point, but also decrease heat-exchange surface difference in temperature efficiently. The heat resistance of heat sink will decline with the increase of pump power, then with the continuous increasing of pump power the heat resistance change slowly.

关 键 词：热沉 阵列射流 强化传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]