流射沸腾冷却强化机理

Flow-Jet Boiling Cooling Enhancing Mechanism

摘要: 流射沸腾冷却强化的核心是利用常压水形成的水柱,以一定的速度贯穿水层,与钢板表面直接接触,产生核沸腾区,引起了强烈沸腾,通过对射流出口速度、高度、直径及水柱间距的优化的实验研究,达到了在整个钢板横截面上获得极强冷却区的效果,对于20mm厚的钢板,冷却速度可达45.2℃/s,板形精度可达3mm/m。

Abstract: The fundamental principle of flow-jet boiling enhancing is proposed. The water column caused by normal pressure water thrusts through the water layer at a certain velocity to directly contact the plate surface. A nuclear boiling area can be established and intensive boiling will occur. The effect of the extreme cooling area on the entire cross section of the steel plate can be obtained via an optimized experimental research on the outlet velocity, height, diameter of flow jet and distance between adjacent water columns. For a plate of 20 mm thick, the cooling speed is up to 45.2℃/s and the shape precision up to 3 mm/m.