不同水口类型下的宽板坯结晶器流场特征数值模拟研究
Numerical simulation of flow field characteristics of wide slab mold with different types of water inlet
黄军 1陈震宇 1雷华 2王永洪 2胡阳虎 3张恒4
作者信息
- 1. 内蒙古科技大学能源与环境学院,内蒙古包头 014010
- 2. 中国重型机械研究院股份公司,陕西西安 710032
- 3. 金属成形技术与重型装备全国重点实验室,陕西西安 710032
- 4. 内蒙古科技大学能源与环境学院,内蒙古包头 014010;北京国能龙威发电技术有限公司,北京 100020
- 折叠
摘要
随着连铸机向着超宽、超厚的设计方向发展,重新评估极端条件下的连铸结晶器流场特征显得十分必要,基于国内后续可能的超宽板坯连铸设计,针对较大断面3 300 mm× 180 mm结晶器流动开展了数值模拟,研究了3种典型板坯连铸水口下的结晶器流动特征.结果表明:两孔水口结晶器的流场形态呈经典双环流流动模式,五孔水口结晶器增加了水口处和中轴处钢液的扰动,CSP型水口结晶器的流场形态呈自下而上的大环流;五孔水口结晶的液面波动既保证了液面波动在安全数值范围内,又增加了对弯月面流动死区的扰动,对流场的优化效果显著;五孔水口典型的结构参数如下:主侧孔倾角为10°～20°,插入深度为150～160 mm,主副孔间距为10～20 mm.
Abstract
With the development direction of ultra-wide and ultra-thick design of caster,it is necessary to re-evaluate the flow field characteristics of casters under extreme conditions.Based on the probable future designs of ultra-wide slab caster in China,the numerical simulation is established for the flow of molds with large cross-section of 3 300 mmX 180 mm,and the flow characteristics of molds with three typical slab continuous casting nozzles were studied.The results show that the flow field of the two-orifice nozzle mold is a classical double-circulation flow pattern,while the five-orifice nozzle mold increases the disturbance of the molten steel at the nozzle and the central axis.The flow field of the CSP-type water port casting mold is a large bottom-up circulation.The fluctuation of the liquid level of the five-orifice water orifice not only ensures the fluctuation of the liquid level within the safe value range,but al-so increases the disturbance of the flow dead zone of the meniscus,whose optimization effect of the flow field is remark-able.The typical structural parameters of the five-hole water outlet are as follows:the angle of the main side hole is 10°-20°,the insertion depth is 150-160 mm,and the distance between the main and secondary holes is 10-20 mm.
关键词
结晶器/浸入式水口/数值模拟/流场/液面波动Key words
casting mold/immersion nozzle/numerical simulation/flow field/level fluctuation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据