不規則微小突起をもつ機械加工面の接触伝熱機構 (第3報)

Abstract

This paper deals with the comparison between the calculated values of thermal contact resistance and experimental results when interstitial material such as air or oil exists in the clearance of interface. The overall behaviour of thermal contact resistance is discussed by the calculated results which give a good fit to the experimental data. The conclusions obtained are as follows : (1) The calculation of thermal contact resistance involves the property that the effective thermal conductivity of air or oil at the interface decreases as the mean. distance of the clearance becomes small. (2) Thermal contact resistance decreases with an increase in thermal conductivity of interstitial material and undertakes smaller variation to the applied load than in vacuum environment. (3) Thermal contact resistance shows a linear increase to surface roughness on a double logarithmic chart. Although the harder contacting members enlarge the thermal contact resistance, its variation in the range of light applied load becomes considerably small with increasing thermal conductivity of interstitial ma-terial.