中厚板轧后冷却圆形喷嘴射流冲击行为分析

The round nozzle jet impact behavior analysis for plate controlled cooling after controlled rolling

在中厚板轧后冷却过程中,喷嘴的射流冲击形式和钢板表面积水层深度对冷却能力有着重要影响。本文利用ANSYS Fluent软件进行模拟仿真,研究了相同口径的圆形喷嘴,在不同倾斜角度、入口速度的条件下,射入不同积水层深度的水流场,分析了水流场中的流速及对钢板表面的冲击压强的变化趋势,得出初始流速、钢板表面积水层深度对射流钢板冷却冲击的影响关系。结果表明:喷嘴倾角越大,初始速度越大,钢板表面的积水层越薄,射流冲击钢板表面的压强值越大,冷却能力越强。

The nozzle jet impact behavior and seeper depth on plate surface have great effects on cooling capacity, during the cooling after hot plate rolling. In this article, based on the ANSYS Fluent software, it simulated water flow field of different seeper depths on the nozzle jet conditions of same caliber, different incline and different initial flow velocity. It analyzed variation tendency of flow rate and impact pressure on plate surface in this water flow field, and gained relationship between the seeper depths and the effect on cooling impact. The results shows that more angle of inclination, larger initial flow rate and thinner seeper thickness can lead to more impact pressure on plate surface and stronger cooling capacity.