层流冷却方式对中厚板温度场影响的数值模拟

针对“首钢”中厚板轧后冷却设备的布置特点,在分析中厚板轧后冷却传热特点的基础上,利用有限差分法模拟了轧后不同层流冷却方式对中厚板温度场分布的影响.模拟结果表明:中厚板内外温差随着冷却速度的增加而加大;同等冷却速度下,为了达到相同的终冷温度,不同的层流冷却方式对中厚板厚度方向的冷却速度和温度分布产生重要的影响.为了达到相同的冷却速度,且在不加大中厚板内外温差的情况下,使喷淋冷却水变稀并且间断开启集管的方式是中厚板冷却的最佳方式.

Numerical Simulation of Effect of Laminar Cooling Patterns on Plate Temperature Field

According to the layout of cooling system in the medium/thick plate plant of ShouSteel and analyzing its heat transfer characteristics,the effects of different laminar cooling patterns on the temperature field of plate were investigated by the numerical simulation using finite difference method.The simulation results showed that the temperature difference between plate's interior and exterior increases with cool-down rate.To achieve the same final cooling temperature at constant cool-down(rate,) different laminar cooling patterns play important roles in the cool-down rate along plate gauge and temperature distribution.And it was shown that opening the spray header intermittent and thining out the cooling water spray are the best way to keep the cool-down rate constant without increasing temperature difference between the interior and exterior of plate.