Investigation of Surface Film Boiling under Free Convection : 2nd Report, Effect of Diameter of Horizontal Cylinder and System Pressure

概要

論文の詳細を見る
In the first report the relation between bubble characteristics and heat transfer was investigated for the surface film boiling from horizontal cylinders of comparatively small diameter. This report deals with the result of some experimental study performed to clarify the effects of the diameter of cylinder and of system pressure on heat transfer. Water, n-pentane, n-hexane, ethanol, carbon dioxide and Freon 22 were used as the test liquid. The diameter of cylinder range from 0.05mm to 16mm and the system pressure was varied from 0.005 to 1 (expressed by reduced value). It was observed that the disturbances of interface between liquid and vapor become intense with an increase of diameter of cylinder. By comparing the experimentally determined heat transfer characteristics with the result of the theoretical analysis already presented by the authors, it has become evident that the experimental results can be correlated by modifying the analytical results in terms of vapor film Reynolds number.
一般社団法人日本機械学会の論文