基于二维非稳态传热 － 多相流耦合模型和三维非稳态单辊结晶器传热模型，结 合生产数据，对平流铸造 Fe78 Si9B13时熔潭形成过程中的流动、传热现象以及结晶器内的 传热特征进行了研究． 结果表明: 在文中工艺条件下，熔潭稳定形成后，其上游弯月面呈 C 形，下游弯月面呈带波纹的斜坡状; 结晶器达到热平衡状态的时间为 20 s; 高温熔体对结 晶器冲击后，会在距表面 0． 0004 m 范围内形成一个热冲击区，该区域表面中心最高温度 可达 513． 5 K; 与径向热膨胀相比，结晶器周向热膨胀对实际总膨胀量的贡献更大，约为 96% ．

On the basis of two models，namely，the developed coupled model of two-dimensional transient heat transfer and multiphase flow and the model of three-dimensional transient heat transfer of single-roller crystallizers， the fluid flow and heat transfer behaviors during the puddle forming precess of the planar flow casting ( PFC) of Fe78 Si9B13 as well as the heat transfer characteristics of rollers are investigated according to the production data． The results show that ( 1) under a given casting condition，the upstream and downstream meniscuses of the formed puddle are respectively in a crescent shape and in a slope shape with ripple; ( 2) the time for the crystallizer to reach a quasi-thermal equilibrium state is 20 s; ( 3) the impact of high temperature melts on the crystallizer causes an melt impact region of a depth of 0. 0004 m to form，where the maximum temperature in the center of crystallizer surface is about 513. 5K; and ( 4) in comparison with the radial thermal expansion，the circumferential thermal expansion of crystallizer plays a more important role in the actual total expansion，which accounts for 96% ．