摘要
在钢坯轧制过程中,需要及时去除高温钢坯表面形成的氧化铁皮,高压水除鳞技术较其它除鳞手段成本更低,除鳞率更高,优势明显,其中稳流器介于除鳞喷嘴前端过滤器与末端收缩段间,起到整流稳流的作用。建立不同结构的除鳞喷嘴稳流器模型,由稳流器两端平齐改为凸起、凹陷、平齐端面两两组合,建立全尺寸高压水除鳞喷嘴模型并进行CFD数值模拟。结果表明,稳流器叶片入口为凹陷结构、出口为平齐结构的稳流器整体湍动能较小,湍动能变化趋势更平稳,涡量变化较小且稳流器末端涡量趋于0。改变稳流器端面叶片形状可以对喷嘴出口动力学参数产生影响,部分结构稳流器出口速度较原结构提高至少2.126 m/s,最高3.817 m/s。
During the billet rolling process,it is necessary to remove the oxide scale formed on the surface of the high-temperature billet in time.Compared with other descaling methods,the high-pressure water descaling technol-ogy has obvious advantages of lower cost and higher descaling rate.The flow stabilizer is located at the front end of the descaling nozzle.Between the filter and the end contraction section,it plays the role of rectifying and stabilizing the flow.In this study,the model of the flow stabilizer of the descaling nozzle with different structures was estab-lished,and the two ends of the flow stabilizer were flushed to a combination of convex,concave,and flat end faces.A full-scale high-pressure water descaling nozzle model was established and CFD numerical simulation was carried out..The results show that the overall turbulent kinetic energy of the stabilizer with the concave structure at the in-let and the flat outlet is smaller,the turbulent kinetic energy changes more steadily,the vorticity changes less and the vorticity at the end of the stabilizer tends to zero.Changing the shape of the vanes on the end surface of the sta-bilizer can affect the dynamic parameters of the nozzle outlet.The outlet velocity of the part of the stabilizer is at least 2.126 m/s higher than the original structure,and the highest is 3.817 m/s.
作者
杨博文
韩鹏
张国新
刘坤
刘广强
YANG Bowen;HAN Peng;ZHANG Guoxin;LIU Kun;LIU Guangqiang(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,Liaoning,China;School of Civil Engineering,University of Science and Technology Liaoning,Anshan 114051,Liaoning,China)
出处
《连铸》
2023年第5期87-94,共8页
Continuous Casting
基金
国家重点研发计划资助项目(2021YFB3702000)
国家自然科学基金资助项目(U20A20272)
邯郸市科研计划重点资助项目(21122015004)。
关键词
除鳞喷嘴
数值模拟
流场特性
稳流器
descaling nozzle
numerical simulation
flow field characteristics
stabilizer
