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Evaluation of Thermal Contact Resistance Between Two Solid Surfaces Using Photoacoustic Technique
International Journal of Thermophysics ( IF 2.2 ) Pub Date : 2020-07-21 , DOI: 10.1007/s10765-020-02717-5
Kakeru Kagata , Kyohei Kageyama , Shinichi Kinoshita , Atsumasa Yoshida

Thermal contact resistance is one of the factors that complicates heat transfer between the interfaces of different components. Because heat transfer is influenced by several factors, it is difficult to estimate all the influencing factors for practical applications. In this study, the thermal contact resistance between two solid surfaces was evaluated using the photoacoustic (PA) technique. The samples consisted of a metal foil and metal cylinders, which had various surface roughnesses at the contact faces measured at the same contact pressure. A one-dimensional analytical solution of the phase lag of the PA signal showed a similar trend with the experimental results. However, there were some quantitative differences between the two groups. By comparing the numerical calculation results for the developed heat conduction model of a cylindrical coordinate system with the experimental results, we found that the in-plane distribution of thermal contact resistance at the contact face contributed to the deviation between the experimental results and the numerical results. The thermal contact resistance was evaluated by considering the in-plane distribution of the thermal contact resistance, and reasonable values of thermal contact resistance were obtained.

中文翻译:

使用光声技术评估两个固体表面之间的热接触电阻

接触热阻是使不同组件界面之间的热传递复杂化的因素之一。由于传热受多种因素的影响,因此很难估计实际应用中的所有影响因素。在这项研究中,使用光声 (PA) 技术评估了两个固体表面之间的热接触电阻。样品由金属箔和金属圆柱体组成,在相同的接触压力下测量的接触面具有不同的表面粗糙度。PA信号相位滞后的一维解析解与实验结果显示出类似的趋势。然而,两组之间存在一些数量上的差异。通过将建立的圆柱坐标系热传导模型的数值计算结果与实验结果进行比较,我们发现接触面处接触热阻的面内分布导致了实验结果与数值结果之间的偏差。 . 通过考虑接触热阻的面内分布来评估接触热阻,并获得合理的接触热阻值。
更新日期:2020-07-21
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