受限浸没射流阵列冲击针肋热沉的传热特性

杨瑞波; 夏国栋; 柴磊

受限浸没射流阵列冲击针肋热沉的传热特性

北京工业大学环境与能源工程学院传热强化与过程节能教育部重点实验室传热与能源利用北京市重点实验室,北京 100124

基金项目: 国家自然科学基金(50876003); 北京市自然科学基金(3092009)

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出版历程
- 收稿日期: 2009-11-07
- 修回日期: 2010-03-30
- 刊出日期: 2010-12-28

Investigation on heat transfer of confined and submerged water jet array impingement on pin-fin heat sinks

Key Laboratory of Heat Transfer and Energy Conversion, Beijing Education Commission, Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education,College of Environmental and Energy Engineering, Beijing University of Technology,Beijing 100124,China

摘要

摘要: 以去离子水为工质,对受限浸没射流阵列冲击矩形针肋热沉的传热特性进行了实验研究.讨论了热沉几何参数和射流雷诺数对传热特性的影响规律.结果表明:针肋高度直接影响换热能力,但并非越高越好;热沉传热特性受针肋宽度与肋间距影响较大,Nu在0.625≤W/G≤1.000内呈塔型分布;Nu在2.5≤H/d≤10.0之间不断下降;S/d在3.00~4.50之间,Nu随S/d的增大单调递增,但Re增大到4000后,换热性能与S/d基本无关;S/d在4.50~7.00之间,Nu随S/d的增大单调递减;热沉的热阻随泵功的增大而降低,但变化渐趋平缓.
- 受限射流 /
- 射流阵列 /
- 肋化表面 /
- 对流热阻 /
- 强化传热
Abstract: The thermal performance of pin-fin heat sinks with confined and submerged liquid water jet array impingement was investigated experimentally.The experimental results indicate that:the performance of heat sinks is closely related to the height of the pin-fin,but not the higher the better;Nusselt number is represented by pyramidal distribution in 0.625≤W/G≤1.000 ;for the confined and submerged jet arrays a strong dependence on both jet-to-target and jet-to-jet spacing can be observed,and Nusselt number falls continu ously between 2.5≤H/d≤10.0 ;an increment in jet-to-jet spacing between 3.00~4.50 can be found to decrease Nusselt number when Re<4000;a reduction in jet-to-jet spacing between 4.50~7.00 can be found to decrease Nusselt number rapidly,especially for high Reynolds number.The thermal resistance of heat sinks will decline with the increase of pump power,but then change slowly.
- confined jet /
- jet array /
- pin-fin surface /
- thermal resistance /

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参考文献(12)

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