通道式中间包非等温流场的数理模拟与优化

为了研究通道式中间包内部结构及非等温条件对流场的影响,通过对中间包通道的位置、角度和岔口的角度进行优化设计,确定了中间包通道的最优设计方案。并采用传统的数值模拟与水模拟试验结合先进的测速手段,基于非等温水模拟试验,对中间包内的速度场、涡量场和RTD等表征参数进行了定量研究,探究非等温条件对中间包流场的影响。结果表明,中间包内通道加热显著影响中间包流场分布,强化了中间包内湍流分布的范围及强度。由水模拟时均化结果可知,非等温条件下的液面最大流速为0.06 m/s,相对于等温条件增大了50%。经过方案对比,主通道位置在通道中心纵向距底部为150 mm高度处,与底面夹角为3°,且岔口与主通道平面呈30°仰角的结构为通道式中间包最优的设计方案。

Mathematical and physical simulation and optimization of non-isothermal flow field in channel tundish

In order to study the influence of the internal structure of the channel-type tundish and the non-isothermal conditions on the flow field, this study optimized the position and angle of the tundish channel and the angle of the fork to determine the optimal design of the tundish channel. This study used traditional numerical simulation and water simulation combined with advanced speed measurement methods, and based on non-isothermal water simulation experiments, quantitatively researches the characteristic parameters such as velocity field, vorticity field and RTD in the tundish. Moreover,it explored the influence of non-isothermal conditions on the flow field of the tundish. The results showed that the heating of the channels in the tundish significantly affects the distribution of the flow field and enhances the range and intensity of the turbulence distribution. From the time-averaged results of the water simulation, it can be seen that the maximum flow velocity of the liquid surface under non-isothermal conditions is 0.06 m/s, which is 50% higher than that under isothermal conditions. After comparison of the schemes, the position of the main channel was at a height of 150 mm from the center of the channel longitudinally to the bottom, and the angle with the bottom was 3°. Simultaneously, the structure with the fork and the plane of the main channel at an elevation angle of 30° was the appropriate solution for the channel tundish.