通过小块扇形永磁体堆积的方式构建了Halbach型螺旋磁场并分析了磁场分布,采用超声波多普勒测速仪(UDV)定量测量了螺旋磁场驱动下GaInSn金属液在圆柱形容器内轴向速度的分布.结果表明:圆柱容器内金属液的轴向流动表现出二次流和轴向环流2种典型的流动模式,且两者之间存在相互转变关系,这种转变实质上是螺旋磁场的旋转分量和行波分量相互竞争的结果.
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