四流连铸中间包内流体流动行为的物理模拟

Physical Modeling on Characteristic of Fluid Flow in Four-Strand Tundish

以某企业四流T型中间包为研究对象,建立模型与原型相识比为0.25的物理模型,并通过物理模拟方法系统研究了导流隔墙上的导流孔结构及湍流控制器结构对中间包内流体流动行为的影响。实验结果表明:优化导流孔结构及改变湍流控制器后,流体平均停留时间增加,相对增加率为21.1%;死区体积分率减小,相对减小率为32.4%;一流和二流的流动一致性增强,两流平均停留时间标准差仅为3 s。

A four-strand tundish model with scaled ratio 1 ： 4 was established to systematically investigate the effect of fluid control device structure （holes on baffle and TI） on fluid flow characteristic in tundish by physical simulation method. It came to the conclusions as followed. The optimal fluid flow characteristic was obtained though optimizing the baffle structure and the TI structure. Comparing with the evaluation parameters of original arrangement, the mean residual time increased by 21.1%, the dead volume fraction decreased by 32.4% and the fluid flow uniformity between strand 1 and 2 was improved. The standard deviation of mean residual time approached 3 s.