Abstract: The experiments of water model were conducted to study the effects of technical parameters on surface vortex in the mold of continuous casting of slab using plexiglass water model. The results indicate that the causes of vortex lie in two aspects. The turbulence of surface flow gives rise to asymmetry of flow momentum near the SEN, and operating parameters cause the asymmetry of the surface flow besides the SEN. In the case of the same casting speed the full open of slide gate causes 7~9 fewer times vortexes on the surface than partial open, and the increase of SEN length under slide gate has a limited effect on decrease of vortex frequency. As the rise of SEN one outlet clogging, the frequency of vortex increases rapidly. When one outlet clogging degree is 70% and slide gate opening degree are 40% and 60%, the vortex frequency are about 2.2 and 2.9 times of that without clogging.

Key words: continuous casting, slab, mould, vortex, water simulation

摘要： 利用水模拟研究了连铸操作工艺对板坯结晶器液面涡流的影响规律，分析了各参数对液面涡流的影响. 结果表明，形成涡流的原因是表面流的湍动性造成的水口两侧表面流动量不对称和操作工艺导致的水口两侧表面流不对称. 相同拉速下，液面涡流在滑板全开启时出现的次数较不全开启时减少7~9次/min；增加水口滑板下方浇管长度对调整滑板不全开启时浇管内的液流流态有利，但对降低液面涡流出现的频度效果有限；当水口出口部分堵塞时，涡流出现的频度迅速上升，滑板开启40%和60%时，单侧出口堵塞70%时的液面涡流频率是未堵塞时的2.2和2.9倍.

关键词: 连铸, 板坯, 结晶器, 涡流, 水模拟