摘要
对一种组合式针肋热沉(圆形针肋阵列穿叉布置等腰直角三角形小肋热沉)的换热特性进行数值模拟研究.考察了三角小肋以不同冲角布置对微针肋通道整体换热特性的影响.计算结果表明,三角小肋布置存在一个最优化角度,即以冲角30°布置的三角小肋的组合式针肋的强化换热效果最佳,远远高于单一圆针肋热沉,但强化换热效果随雷诺数的增大而降低.
Numerical simulations and analysises were presented on heat transfer characteristic for combined micro pin fins heat sink which consisted of circular pin fins with isosceles right-angled triangle pin fins on both end sides. The numerical results were analyzed according to different attack angle arrangements of right-angled triangle pin fins. Comparing with micro circular pin fin heat sink, the heat transfer for combined micro pin fin heat sinks is improved greatly. In addition, the computational evaluations indicate that the heat transfer enhancement effect of combined micro pin fin heat sink with the attack angle 30~ is the most significant. However, the heat transfer enhancement effect is decreased as Re increased.
出处
《北京工业大学学报》
EI
CAS
CSCD
北大核心
2012年第11期1698-1703,共6页
Journal of Beijing University of Technology
基金
国家'973'计划资助项目(2011CB710704)
关键词
微针肋
强化换热
数值模拟
micro pin fin
enhanced heat transfer
numerical simulation
