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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基金项目: 国家自然科学基金(50876003);北京市教育委员会科技计划重点项目(KZ200710005001);北京市属高等学校人才强教计划项目(PHR200906104);教育部博士点学科专项科研基金(20070005009)

Flow and heat transfer characteristics in a periodical changeable cross-section micro-channel heat sink

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: 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.
- 周期性变截面 /
- 微通道 /
- 传热特性 /
- 摩擦阻力系数
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.
- periodical changeable cross-section /
- micro-channel /
- heat transfer /
- friction factor

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