The Combined Thermal and Mechanical Effect of an Interstitial Gas on Thermal Rectification Between Periodically Grooved Surfaces

IF 2 Q2 ENGINEERING, MECHANICAL
K. Chumak, R. Martynyak
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引用次数: 0

Abstract

This paper presents a study on the combined thermal and mechanical effect of interstitial gas on thermal rectification between a periodically grooved surface and a flat one. To evaluate the interstitial medium influence, the analytico-numerical solution to the corresponding thermoelastic contact problem is constructed taking into account the effect of thermal strains on gap deformation. The results are provided for the Stainless Steel AISI 304 – Aluminum Alloy A380 pair in the presence of air or krypton in the interface gaps. The effects of the gas thermal conductivity and pressure, the imposed pressure and heat flux, and the maximum groove height on the effective thermal contact resistance and the level of thermal rectification are analyzed. It is revealed that taking into account the mechanical effect of the gap filler leads to lower values of thermal rectification level. Also, the change of the gap filler thermal conductivity has more pronounced effect that the change of its pressure.
间隙气体对周期性沟槽表面间热整流的热学和力学综合效应
本文研究了间隙气体对周期性沟槽表面与平面表面之间热整流的热学和力学综合效应。为了评估间隙介质的影响,考虑热应变对间隙变形的影响,构造了相应的热弹性接触问题的解析数值解。结果提供了在界面间隙存在空气或氪的情况下,不锈钢AISI 304 -铝合金A380对。分析了气体导热系数和压力、施加的压力和热流密度以及最大槽高对有效接触热阻和热整流水平的影响。结果表明,考虑间隙填充剂的力学效应会导致较低的热整流水平。同时,间隙填料导热系数的变化比其压力的变化影响更为显著。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Frontiers in Mechanical Engineering
Frontiers in Mechanical Engineering Engineering-Industrial and Manufacturing Engineering
CiteScore
4.40
自引率
0.00%
发文量
115
审稿时长
14 weeks
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