| 基于CMY模型改进的界面热阻模型及其应用 |
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| 引用本文： | 陈剑楠,邹顒,罗小兵.基于CMY模型改进的界面热阻模型及其应用[J].工程热物理学报,2012(3):509-512. |
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| 作者姓名： | 陈剑楠 邹顒 罗小兵 |
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| 作者单位： | 华中科技大学能源与动力工程学院;华中科技大学武汉光电国家实验室MOEMS研究部 |
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| 基金项目： | 国家973项目资助项目(No.2009CB320203) |
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| 摘 要： | 导热膏填充的接触界面热阻由接触热阻和间隙热阻两部分组成。本文采用截锥体接触的单热流通道模型代替CMY模型中的圆盘接触的单热流通道模型,推导出了改进的接触热阻计算公式。本文还结合间隙热阻的计算公式,得到了一种改进的导热膏填充的接触界面热阻模型。通过分析得出了如下结论:对于使用导热膏填充的接触界面的热阻而言,其主要影响因素为接触表面的粗糙度和导热膏的导热系数,而接触界面间压力对其的影响则相对较小。
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| 关 键 词： | 接触热阻 截锥体模型 导热膏 |
An Improved Thermal Joint Resistance Model Based on CMY Model and its Application |
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| CHEN Jian-Nan,ZOU Yong,LUO Xiao-Bing.An Improved Thermal Joint Resistance Model Based on CMY Model and its Application[J].Journal of Engineering Thermophysics,2012(3):509-512. |
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| Authors: | CHEN Jian-Nan ZOU Yong LUO Xiao-Bing |
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| Institution: | 1,2) (1.Energy and power institute,Huazhong University of Science and Technology,Wuhan 430074,China; 2.Division of MoEMS,Wuhan National Lab.for Optoelectronics,Huazhong University of Science and Technology, Wuhan 430074,China) |
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| Abstract: | The thermal resistances of grease-filled interfaces consist of contact resistance and gap resistance.The single heat flux model of cut-off cone contact was used to replace CMY’s disk contact model and an improved contact resistance equation was derived.Combined with gap resistance equation,an improved thermal joint resistance model was obtained.Based on this model,it can be found that for the resistance of grease-filled interfaces,the main influencing factors are roughness of contact surfaces and thermal conductivity of grease,however,pressure between contact surfaces has relative small influence. |
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| Keywords: | thermal contact resistance cut-off cone grease-filled interface |
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