【摘要】 为了评价某钢厂中间包内部挡墙结构对流场的影响并改进钢液的流动行为，选取符合当下生产条件的最优方案，提升特殊钢种质量。在原有挡墙结构的基础上对导流孔进行设计和优化，考虑导流孔的个数，安装高度，倾角因素设计正交试验。通过水模拟试验方法评价原型挡墙结构下中间包的流场情况，进行极差分析。考虑以死区比例和峰值时间标准差为指标下各因素影响情况，找到最优导流孔结构。运用Ansys Fluent建立数值模拟，模拟优化前后中间包的流场和温度场。试验结果发现，原型中间包流场存在水口一致性较差，内部钢液流动特性差等问题，死区比例为29.26%,峰值时间标准差高达61.52 s。水模试验优化后的中间包死区比例为27.92%,较原型中间包提升了1.34%,且峰值时间标准差提升了87.27%,水口温差降为0.2 K,流场整体十分均匀，两流流动的一致性得到明显改善。更多还原

【Abstract】 In order to evaluate the influence of baffle wall structure on the flow field, improve the flow behaviour of liquid steel in the middle tundish of a steel plant, select the optimal solution in line with the current production conditions and improve the quality of special steel grades, the guide holes on the basis of the original baffle wall structure were designed and optimized.Orthogonal experiments are designed considering the number of guide holes, mounting height, and inclination angle factors.The flow field of the tundish under the prototype retaining wall structure is evaluated by the water simulation experiment method for conducting range analysis. Thus, considering the influence of various factors under the indexes of dead zone ratio and standard deviation of peak time, the optimal diversion hole structure can be found.Numerical simulation is carried out using Ansys Fluent to simulate the flow and temperature fields of the tundish before and after optimization. The experimental results show that the flow field of the prototype tundish has problems such as poor consistency at the mouth and poor flow characteristics of the internal liquid steel, with a dead zone ratio of 29.26% and a peak time standard deviation of 61.52 s.Under the water model experiment, the optimized tundish dead zone ratio is 27.92%, which is 1.34% higher than that of the prototype tundish.The standard deviation of peak time is 87.27% higher, and the water inlet temperature difference is reduced to 0.2 K.The flow field is very uniform as a whole, and the consistency of the two streams is significantly improved.更多还原