薄带连铸新型布流系统的数学物理模拟

为了评价薄带连铸新型布流系统的可行性，按照相似理论原理，建立了1∶1水模型试验装置，应用中科院DJ800系统测定了熔池表面波动情况.同时采用CFD软件，应用连续性方程、N-S方程及湍流κ-ε方程模拟计算了该双辊熔池内部的流场分布.在此基础上分析了宝钢新旧两套布流系统在流动、液面波动方面的差别.实验和计算结果表明，新型布流系统对于降低液面波动、改善表面流场形态具有很好的效果，利用CFD技术结合物理模拟试验能够很好地用于评判布流系统的优劣.

Mathematical and Physical Simulations of the New Type Feeding System in Strip Casting

A 1∶1 scale water model tester of twin roll strip casting was set up based on the Froude number and Reynolds number similarity criteria in order to evaluate the new type feeding system. Fluctuation in the surface of the molten pool producing in twin roll strip casting process was studied by hydraulics simulation experiment using DJ800 system. Meanwhile the flow filed distribution inside the molten pool of the twin roll strip casting was studied by solving the continuous equation，N S equation and κ ε equation using CFD software. Differences of the flow field and surface fluctuation were analyzed on new and old type of the feeding system in Baosteel. The results showed that the new type feeding system had great effect for lowering the wave fluctuation and improving the surface flow filed morphologies of the molten pool. Moreover， the CFD method combined with physical modeling test was suitable for assessing the feeding system used in the strip casting.