孙滔,高学农,欧阳灿,唐亚男
SUN Tao,GAO Xue-nong,OU Yang-can,TANG Ya-nan(Key Lab.of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education

• 1:华南理工大学传热强化与过程节能教育部重点实验室

摘要(Abstract)：

通过在液冷式CPU散热器蛇形流道内填充不同粒径的不锈钢珠,使液冷式CPU散热器流道形成类似"多孔介质"的复杂流道以提高其散热性能。通过对改进前后液冷式CPU散热器的试验研究,分析了各因素对液冷式CPU散热器的传热和流阻性能的影响规律。结果表明:在本试验范围内,相同Re和Pr下,改进后散热器的对流换热系数为改进前的1.2~4.8倍,阻力系数f是改进前的1.4~4倍;散热器填充Φ4mm开孔不锈钢珠的强化传热效果最佳,芯片表面温度较填充前降低了33,°对流换热系数增大4.8倍,而流动阻力仅增加了1.4倍。
Based on the mechanism of heat transfer enhancement inside porous media,one kind of water cooling heat sink is changed to be a packed heat sink by filling the flow channel with various stainless steel beads.The overall performance of packed heat sinks is compared with that of unpacked heat sink under the same pump power.The results showed that: Over the range of Reynolds number and Prandtl in the experiment,When the Reynolds number and Prandtl are the same,the convective heat transfer coefficient of packed heat sink is 1.2~4.8 times than that of unpacked heat sink and the friction factor of packed heat sink is 1.4~4 times than that of unpacked heat sink.the heat sink filled with Φ4mm perforated stainless steel beads has the best heat chansfer performance,CPU surface temperature is 33 degrees lower than the unpacked heat sink,the convection heat transfer coefficient of packed heat sink is increased 4.8 times,while the flow resistance is increased only 1.4 times.

关键词(KeyWords)： 散热器;不锈钢珠;多孔介质;传热强化;流动阻力
heat sink;stainless steel beads;porous media;heat transfer enhancement;flow resistance

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(20976056)

作者(Author): 孙滔,高学农,欧阳灿,唐亚男
SUN Tao,GAO Xue-nong,OU Yang-can,TANG Ya-nan(Key Lab.of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education

参考文献(References)：

• [1]闫晓,肖泽军,黄彦平,等.多孔介质中流动换热特性的研究进展[J].核动力工程,2006,27(1):77-82.
• [2]张永祥,陈鸿汉.多孔介质溶质运移动力学[M].地震出版社,2000:53-61.
• [3]Jiang P X,Wang Z,Ren Z P,et al.Experimental Re-search of Fluid Flow and Convection Heat Transfer inPlate Channels Filled with Glass or Metallic Particles[J].Experimental Thermal and Fluid Science,1999,20:45-54.
• [4]Huang G J,Chao C H.Heat chansfer measurement andanalysis for sentered porous channels[J].Heat chans-fer,1994,116:456-464.
• [5]王补宣,张志军,杜建华.平行平板间填充球粒填料的传热特性试验研究[J].工程热物理学报,1999,20(2):220-223.
• [6]Jiang P X,Li M,Lu TJ,et al.Experimental researchon convection heat transfer in sintered porous platechannels[J].International Journal of Heat and MassTransfer,2004,47(11):2085-2096.
• [7]陈建业.大功率电力电子装置冷却系统的原理与应用[J].国际电力,2002,6(4):48-52.
• [8]Ryu J H,Choi D H,Kim S J.Three Dimensional Nu-merical Optimization of A Manifold Microchannel HeatSink[J].International Journal of Heat and MassTransfer,2003,46:1553-1562.
• [9]杨冬梅,徐德好.液冷冷板的研究[J].电子机械工程,2006,22(1):4-6.
• [10]刘伟,杨昆.管内核心流强化传热的机理与数值分析[J].中国科学E辑:技术科学,2009,39(4):661-666.