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喷射气体冷却是带钢连续退火和镀后冷却过程中最重要的冷却方法,不同的冷却器结构对冷却性能影响很大。针对带钢连续退火及镀后冷却风管式冷却器工艺过程,将计算区域划分为2个子区域,经过网格独立性检验,在一定网格数目基础上利用数值模拟软件进行数值模拟研究。通过对风箱风管区域研究获取冷却器的压力流量公式,对冲击射流冷却区域研究获取带钢表面对流换热系数及带钢冷却速度变化。典型工况下带钢表面平均对流换热系数为117.29W/(m2·K),带钢冷却速度14.0℃/s。
Spraying gas cooling is the most important cooling method in continuous strip annealing and post-plating cooling. Different cooling structures greatly influence the cooling performance. Aiming at the process of continuous annealing of strip steel and cooling air duct cooler after plating, the calculation area is divided into two sub-areas. After grid independence test, numerical simulation software is used to conduct numerical simulation based on a certain number of grids. The formula of pressure flow of the cooler was obtained by studying the duct area of the bellows. The convection heat transfer coefficient of the strip surface and the cooling speed of the strip were obtained from the cooling area of the impact jet. Under typical conditions, the average convective heat transfer coefficient of the strip surface is 117.29W / (m2 · K) and the strip cooling speed is 14.0 ℃ / s.