単一液滴の高温面における蒸発熱伝達特性

概要

論文の詳細を見る
An experimental study has been conducted to investigate the heat transfer of evaporation of a water droplet on a hot stainless-steel cylinder coated with a refractory paint. In order to measure temperature changes of the cylinder, four thermocouples are used. Their radial positions are 0, 1.5, 3.0 and 4.5mm away from its central axis, respectively. The distributions of temperature and heat flux of the heat transfer surface are obtained with the inverse calculation of two-dimensional heat conduction in both coating and metal regions. In the calculation the liquid-solid (L-S) contact surface is assumed to be a circle whose center is located at the cylinder axis. The measured temperature drops rapidly upon L-S contact, and after attaining a minimum, it increases slightly and then remains constant for a while. In the L-S contact region, the surface temperature distribution is almost uniform, while the heat flux is higher in the boundary than in the center. The total heat transferred through the heat transfer surface agrees well with that required for the evaporation of a droplet.
一般社団法人日本機械学会の論文
1992-07-25