| 周期性变截面微通道热沉内流体流动与传热特性 |
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| 引用本文： | 夏国栋,徐志波,齐景智. 周期性变截面微通道热沉内流体流动与传热特性[J]. 航空动力学报, 2010, 25(1): 6-10 |
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| 作者姓名： | 夏国栋 徐志波 齐景智 |
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| 作者单位： | 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,北京,100124;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,北京,100124;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,北京,100124 |
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| 基金项目： | 国家自然科学基金,北京市教育委员会科技计划重点项目,北京市属高等学校人才强教计划项目,教育部博士点学科专项科研基金 |
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| 摘 要： | 以去离子水为冷却工质,对周期性变截面微通道热沉内流体流动与传热特性进行了实验研究.获得了流体流过周期性变截面微通道热沉内的摩擦阻力系数、Nu数、不同热流密度下的加热膜温度、热阻和泵功的关系,并与传统直通道进行比较分析,结果显示周期性变截面微通道热沉由于流体冲击肋侧壁,增加了局部阻力,导致消耗的泵功增加,但换热能力却有了显著的提高,壁面温差减小,具有非常优越的换热性能,能够满足高热流密度微电子器件冷却的需要.
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| 关 键 词： | 周期性变截面 微通道 传热特性 摩擦阻力系数 |
| 收稿时间： | 2008-12-26 |
| 修稿时间： | 2009-03-23 |
Flow and heat transfer characteristics in a periodical changeable cross-section micro-channel heat sink |
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| XIA Guo-dong,XU Zhi-bo and QI Jing-zhi. Flow and heat transfer characteristics in a periodical changeable cross-section micro-channel heat sink[J]. Journal of Aerospace Power, 2010, 25(1): 6-10 |
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| Authors: | XIA Guo-dong XU Zhi-bo QI Jing-zhi |
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| Affiliation: | 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 |
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| Abstract: | This paper conducted an experimental investigation on flow and heat transfer characteristics associated with the forced flow of de-ionized water in a periodical changeable cross-section micro-channel(PCMC) heat sink.The friction factor,Nusselt number,average temperature of heating film and thermal resistance of heat sink under different pump power were obtained.In comparison with traditional micro-channels with constant cross-section,the periodical changeable cross-section micro-channels could produce higher heat transfer coefficients and friction factors. |
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| Keywords: | periodical changeable cross-section micro-channel heat transfer friction factor |
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