Effects of contact pressure, interface temperature, and surface roughness on thermal contact conductance between stainless steel surfaces under atmosphere condition. (March 2016)

• Record Type: Journal Article
• Authors: Dou, Ruifeng; Ge, Tianran; Liu, Xunliang; Wen, Zhi
• Is Part Of: International journal of heat and mass transfer. Volume 94(2016:Mar.)
• Page Start: 156
• Page End: 163
• Publication Date: 2016-03
• Subjects: Heat conduction -- Thermal contact conductance -- Surface roughness -- Contact pressure; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2015.11.069
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: TCC exhibits a power law relationship with contact pressure and interface temperature. The effect of interface temperature on TCC varies at different surface roughness. Empirical correlation equations were obtained for different surface roughness with relative error of ±20%. Abstract: An experiment was performed to investigate the effects of interface temperature, specimen surface roughness, and contact pressure on thermal contact conductance (TCC). Specimens were prepared using SUS 304 stainless steel, the interface temperature was in the region of 360–640 °C, the contact pressure was between 2.39 and 15.17 MPa, and the surface roughness ranged from 0.25 μm to 2.00 μm. All experiments were conducted in ambient atmosphere. Results indicated that TCC presents a power law relationship with contact pressure and interface temperature. While the contact pressure exponent varied between 0.20 and 0.46 at different surface roughness, the interface temperature exponent showed a much wider range of 0.45–2.36. TCC increased more rapidly with temperature in specimens with higher surface roughness than in those with lower surface roughness. The correlation equations between thermal contact conductance, contact pressure, and interface temperature revealed a relative error of 20%.