螺旋磁场驱动金属液轴向流动的研究 - 钢铁钒钛.PDF

第34卷第4期 钢摇 铁摇 钒摇 钛 Vol.34,No.4 2013年8月 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 IRON STEEL VANADIUM TITANIUM 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 August2013 螺旋磁场驱动金属液轴向流动的研究 王松伟,那贤昭,张新德 (钢铁研究总院先进钢铁流程及材料国家重点实验室,北京 100081) 摘摇 要:通过螺旋结构的永磁体搭建了螺旋磁场,采用超声波多普勒测速的方法测量了螺旋磁场作用下GaInSn合 金在圆柱和方形容器内轴向速度的分布情况。 结果表明:圆柱容器内液态金属的轴向流动有大环流和二次流两种 形态,其流动形式是旋转磁场和移动磁场共同作用的结果,二次流的发生大大降低了螺旋磁场轴向上的搅拌效果。 关键词:金属液;永磁体;螺旋磁场;电磁搅拌;轴向流动 中图分类号:TF777摇 摇 文献标志码:A摇 摇 文章编号:1004-7638(2013)04-0052-05 DOI:10.7513/ j.issn.1004-7638.2013.04.010 Research on the Axial Flow of Liquid Metal Driven by a Helical Magnetic Field Wang Songwei,Na Xianzhao,Zhang Xinde (State Key Laboratory of Advanced Steel Processing and Products,Central Iron and Steel Research Institute,Beijing 100081,China) Abstract:Verticalflow of liquid metal in cylindrical andhexahedral vesselsdriven by ahelical magnetic field was investigated in the experiments. The helical magnetic field was constructed with several pieces of permanent magnets magnetizing in the radius direction. The vertical velocity distribution of liquid GaInSn alloy wasmeasuredwith ultrasonic Doppler velocimeter (UDV). The axialflow resultedfromthe competition of thelargeverticalvortex drivenbytravelingmagneticfieldandthesecondaryflow drivenby the rotating magnetic field. The axial stirring effect greatly decreased when the secondary flow occurred. Key word:liquid metal,permanent magnet,helical magnetic field,electromagnetic stirring,axial flow [5] 力于采用螺旋磁场来实施电磁搅拌的研究 。 20 0摇 引言 [6]