| 微/小圆柱针肋热沉传热特性 |
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| 引用本文： | 赵孝保,卢铃,刘志刚,朱晓华,李奇贺. 微/小圆柱针肋热沉传热特性[J]. 化工学报, 2011, 62(3): 672-677 |
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| 作者姓名： | 赵孝保 卢铃 刘志刚 朱晓华 李奇贺 |
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| 作者单位： | 南京师范大学能源与机械工程学院;山东省科学院能源研究所 |
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| 基金项目： | 教育部科学技术研究重点项目，国家自然科学基金项目 |
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| 摘 要： | 圆柱形微/小针肋热沉热阻由底板及微/小肋热传导热阻、冷却液与肋间对流换热热阻以及冷却液吸热焓变热阻等组成。以去离子水为冷却液，恒定热流下，进行了叉排排布的不同尺寸的微/小圆柱形针肋热沉的单相强制对流传热实验，实验Re为100～1000，加热功率为50～300 W。实验表明：微/小圆柱形针肋热沉的Nu随Re和加热功率的增大而增大，当Re=600时对
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| 关 键 词： | 微/小柱群 对流换热 热沉 热阻 |
Heat transfer of circular shaped micro/mini pin-fin heat sink |
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| ZHAO Xiaobao,LU Ling,LIU Zhigang,ZHU Xiaohua,LI Qihe. Heat transfer of circular shaped micro/mini pin-fin heat sink[J]. Journal of Chemical Industry and Engineering(China), 2011, 62(3): 672-677 |
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| Authors: | ZHAO Xiaobao LU Ling LIU Zhigang ZHU Xiaohua LI Qihe |
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| Abstract: | The thermal resistances of micro/mini circular shaped pin-fin heat sinks are from the heat conduction through the sink bottom layer and the pin fins, the heat convection of cooling liquid between the sink layer and the pin fins, and the enthalpy change of the cooling liquid.The heat transfer characteristics through the bank of circular shaped micro/mini pin-fin heat sinks are investigated experimentally with deionized water as cooling fluid and by heating at constant heat flux over Reynolds numbers ranging from 100 to 1000, with the heating power in the range of 50—300 W.It is found that the convective heat transfer coefficient increases with the volume flow rate of cooling fluid and the Nusselt number increases with the increase of the Reynolds number and the heating power.As the volume flow rate of fluid increases, the total thermal resistance of the heat sinks decreases exponentially and gradually reaches a constant value.The experimental results show that the height of micro/mini pin fins of the heat sinks has little effect on the convective heat transfer and there is no difference in the total thermal resistance and different heights of micro/mini pin fins as the volume flow rate changes.The experimental results are compared with some relations in literature, and the Zukauskas relation is appropriate to predict the Nusselt number. |
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