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	定向凝固多孔铜热沉传热的分段强化
	陈刘涛 ; 张华伟 ; 刘源 ; 李言祥 ; CHEN Liutao ; ZHANG Huawei ; LIU Yuan ; LI Yanxiang
	2016-03-30 ; 2016-03-30
关键词	热沉 微通道冷却 多孔金属 金属-气体共晶 定向凝固 glass fiber reinforced polymer sheet beamcolumn structure progressive collapse numerical analysis TK124
其他题名	Enhancement of the heat transfer for directionally solidified porous copper heat sinks by cutting into sections
中文摘要	通孔率测试表明定向凝固多孔铜通孔率随其沿孔长方向长度的减小而线性增大。该文采取分段的方法以提高多孔铜的通孔率。分段后定向凝固多孔铜热沉的传热性能显著提高,4段式热沉在进出口压差为12kPa时,其换热系数可以达到6W/(cm2·K),比未分段前提高了50%~70%。实验结果表明:通过分段使得多孔铜的通孔比例达到80%以上时即是比较合适的分段情况。当给定定向凝固多孔铜的初始结构参数时,可以根据多孔铜通孔率与其沿孔长方向长度之间的线性关系得到合适的分段数。; The area ratio of penetrative pores in porous copper increases as the length along the pore axis direction decreases.The penetration ratio can be increased by cutting the porous copper perpendicular to the pore axis into several sections aligned with the pore axis.This significantly improves the heat transfer in the porous copper heat sink.For a pressure drop of 12 kPa,the heat transfer coefficient in a porous copper heat sink with 4sections is 6W/(cm2·K),which is 50%—70% higher than the initial value.Experiments also show that the appropriate number of sections for the porous copper makes the penetration ratio per section equal to 80%.Thus,the appropriate number of sections for the porous copper can be given based on the original porous structure.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/141779]
专题	清华大学
推荐引用方式 GB/T 7714	陈刘涛,张华伟,刘源,等. 定向凝固多孔铜热沉传热的分段强化[J],2016, 2016.
APA	陈刘涛.,张华伟.,刘源.,李言祥.,CHEN Liutao.,...&LI Yanxiang.(2016).定向凝固多孔铜热沉传热的分段强化..
MLA	陈刘涛,et al."定向凝固多孔铜热沉传热的分段强化".(2016).

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