摘要
以钢包水模型为研究对象,用数值模拟方法研究了两类三种示踪剂(数学示踪剂:被动标量,物理示踪剂:纯水和KCl溶液)在流场中的传输过程。结果表明,被动标量和纯水示踪剂的传输规律基本相同;相比前两者,密度大于水的示踪剂(KCl溶液)较快地沿水模型中主循环流向水模型底部传输,并沿水模型底部向气柱和偏心侧区域运动,随后沿偏心侧壁面向上传输至小循环流,但由于偏心侧底部“死区”的存在,示踪剂在此区域停留时间较长,沿偏心侧壁面向上传输过程有所延缓;最终,从水模型中示踪剂质量分数纵截面图和监测点得到的混匀时间均表明,KCl溶液示踪剂较快完成混匀过程。
Focused on the water model of ladle,a numerical simulation was carried out to calculate the transport process of two groups and three types of tracer(mathematical tracer:passive scalar;physical tracer:pure water tracer and KCl solution tracer)in flow field.The results show that the transport principle of passive scalar and pure water tracer is basically the same.Compared with passive scalar and pure water tracer,denser KCl solution tracer exhibit different transport process as follows:it flows downward to the bottom of water model,followed by main circulation flow with a higher speed,and moves faster along the bottom of the water model towards gas plume and off-side region,afterwards it flows upward to the small circulation flow near the top of off-side wall.However,owing to the existence of"dead zone"at the bottom of off-side of water model,KCl solution tracer stays longer in this zone.As a result,the transport process that the KCl tracer flows upward along the off-side wall is delayed.Finally,from the figures of mass fraction of tracers at the cross plane of water model and the mixing time at monitor points,it is indicated that KCl solution tracer could complete mixing process much faster than the above mentioned other two tracers.
作者
张丹
陈超
张宇星
王社斌
ZHANG Dan;CHEN Chao;ZHANG Yuxing;WANG Shebin(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of Interface Science and Engineering in Advanced Materials,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《太原理工大学学报》
CAS
北大核心
2020年第1期50-58,共9页
Journal of Taiyuan University of Technology
基金
北京科技大学钢铁冶金新技术国家重点实验室开放基金(KF18-03)
