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首页> 外文期刊>Journal of Thermophysics and Heat Transfer >Thermal Contact Resistance of Nonconforming Rough Surfaces, Part 2: Thermal Model
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Thermal Contact Resistance of Nonconforming Rough Surfaces, Part 2: Thermal Model

机译：不合格粗糙表面的热接触电阻，第2部分：热模型

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摘要

A new analytical model is developed for thermal contact resistance (TCR) of nonconforming rough surfaces. TCR is considered as the superposition of macro- and microthermal resistances. The effects of roughness, load, and radius of curvature on TCR are investigated. It is shown that there is a value of surface roughness that minimizes the TCR for a fixed load and geometry. Simple correlations for determining TCR, using relationships introduced in Part 1 of this study, are derived that cover the entire range of TCR from conforming rough to smooth spherical contacts. With introduction of an approximate model, it is shown that the effective microthermal resistance is not a function of surface curvature and contact pressure profile. The comparison of the present model with 600 experimental data points shows good agreement in the entire range of TCR. A criterion for conforming contacts is proposed that gives a range for the ratio of out-of-flatness to surface roughness.
机译：针对不合格粗糙表面的热接触电阻（TCR），开发了一种新的分析模型。 TCR被认为是宏观和微观热阻的叠加。研究了粗糙度，载荷和曲率半径对TCR的影响。结果表明，存在一定的表面粗糙度值，可将固定负载和几何形状的TCR降至最低。利用本研究的第1部分介绍的关系，得出用于确定TCR的简单相关关系，该关系涵盖了从合格的粗糙接触到光滑球形接触的整个TCR范围。通过引入近似模型，表明有效的微热电阻不是表面曲率和接触压力分布的函数。本模型与600个实验数据点的比较表明，在整个TCR范围内，都具有良好的一致性。提出了一种用于接触的标准，该标准给出了不平度与表面粗糙度之比的范围。

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