·320* 北京科技大学学报 1998年第4 240FQ ,Q单挡墙单坝 80 无流控装置 200 阻镇特单清语军资人甘 60 160 单挡墙单助 40 120 阻流器 8 0 母 20 阻流器·阻流器单挡墙单 801 无流控装骨 0 8 0.60.8 1.01.21.41.61.8 0.60.81.01.21.41.61.8 V(m'.h) 以(m3.h 图7不同流量下平均停留时间及死区体积比率的比较 4 结论 中间包使用阻流器可改变传统的中间包内流场，增加滞止时间和平均停留时间，增大活 塞流体积，消除中间包短流，从而有利于中间包内夹杂物的去除.在较高的拉速下使用阻流器 +单挡墙+单坝结构可使中间包内的流态最优， 参考文献 1 Singh S,Koria S C.Tundish Steel Melt Dynamics With and Without Modifiers Through Physical Modelling.Ironmaking and Steelmaking,1996,23(3):255 2 Mclean A.The Turbulent Tundish-Contaminator or Refiner?Steelmaking Conference Proceedings, 1988,79:3 3 Sinha S K,Godiwalla K G.Fluid Flow Characterization in Twin Strand Continuous Casting Tundish Water Model.Ironmaking and Steelmaking.1993,20(6):485 Fluid Flow Characterization in the Tundish with Preventur Pad Li Jiying Han Chuanji)Cai Kaike Yang Subo Yan Xuemo 1)Metallurgy School.UST Beijing,Beijing 100083,China 2)Iron and Steel Research Institute of Panzhihua ABSTRACT Through physical and mathmaterical simulation,the flow patterns in the tundish with a new-born type of flow control device-Preventur Pad were studied. Compared with the typical dams and weirs,preventur pad can return the fluid from the stockel directly to itself,maximize the mean and minimum residence times,increase plug volume and cancel short circulation in the tundish.Especially in high-speed casting, preventur pad+dam+weir has better effect on the removing of inclusions from the tundish. The fluid patters in the tundish with preventur pad have been proved through mathematical simulation. KEY WORDS tundish:fluid flow:water modelling;preventur pad