Abstract: With using three-dimensional math model established by ANSYS Fluent software the numerical simulation on flow distribution in nozzle and pool area designed for 6. 5% Si high silicon steel twin-roll 2. 0 mm thin strip casting has been carried out and according to calculated results 1/4 model of liquid flowing and heat transferring the original designed structure is optimized, that is canceling the contacted angle between flow distribution holes and pool to ensure whole cross sectional area of holes constant, modifying the flow direction of straight holes from K to X, designing 3 horizontal flow holes, i. e. double 10 mm x 12 mm holes and one 21 mm x 12 mm hole with distance between the holes- 33 mm, while changing the cross section area of oblique flow hole to 7 mm x 10 mm. The simulated results verify that optimized structure is more available to formation of solidification zone.

摘要： 釆用ANSYS Fluent软件建立三维数学模型对6. 5% Si钢双根2. 0 mm薄带连铸设计的布流水口及熔 池区域进行了数值模拟,并根据1/4流体区域模型的流动及传热计算结果,优化了原设计结构;取消布流孔与熔池 区域接触倾角，保证水孔总横截面积不变，将直布流水孔流向从丫向改为X向，水平布流水孔设计成3个,2个10 mm x 12 mm及1个21 mm X 12 mm孔，布流水孔的间距为33 mm,同时侧布流水孔的截面积变为7 mm X 10 mm。经模拟结果验证，优化结构更利于凝固区的形成。

关键词: 6.5%Si钢, 双辊薄带连铸, 布流孔, 三维, 数值模拟, 凝固区, 优化