高温物体のサブクール衝突水噴流による過渡沸騰冷却

概要

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Transient boiling heat-transfer rate to a two-dimensional impinging water jet was measured throughout the surface of a 20×150 mm rectangle, during cooling from about 400℃ to 100℃. Time-dependent surface temperature distribution and the progress of a solid-liquid contact front were obtained for a jet subcooling from 14 K to 50 K. Solid-liquid contact at the stagnation line starts from the moment of jet impingement, where violent boiling occurs and generated vapor splashes the water film, resulting in no water supply to the outer region of the surface. The temperature of the outer surface remains high up to the time when the solid-liquid contact front reaches it, and a large temperature gradient appears near the front. The surface temperature for the initiation of solid-liquid contact is higher at locations nearer the stagnation line and with higher jet subcooling.
社団法人日本機械学会の論文
1995-10-25