(上海大学 上海市钢铁冶金国家重点实验室，上海 200072)
摘 要: 使用金属镓液对交变磁场作用下的金属液紊流现象进行了直接观察，并对相应的成因进行了探讨，结果发现交变磁场中磁场分布不均匀是引起紊流的根本原因。提出采用磁场分布不均度参数来衡量磁场不均匀性，该参数的提出为电磁净化器的设计和提高净化效果提供了理论依据。为了探讨控制紊流的方案，还采用了模拟体系，研究了不同截面形状的管型及不同磁感应分布不均度下颗粒的迁移规律，并分析了管型影响紊流形成的原因。
关键字: 交变磁场； 紊流； 磁感应强度分布不均度； 净化
purified by alternating magnetic field
（Shanghai Enhanced Laboratory of FerrousMetallurgy,
Shanghai University, Shanghai 200072, P.R.China）
Abstract: The turbulent in the liquid gallium under the travelling magnetic field was observed, and the reason for its formation was discussed. It was found that the distribution of the magnetic flux density in the travelling magnetic field will dominate the formation of the turbulent. The factor named inhomogeneity of the magnetic field was adopted to assess the distribution of the magnetic field. It is very helpful for designing the purifying equipment and for the sake of the ways of increasing the inclusionremoval efficiency by adopting this factor. The simulative experiments were carried out to study the particles' migrating behavior in different pipes under different Hom , the reason why the shape of the pipe affected the migration of the particles was discussed too.
Key words: alternating magnetic field; turbulent; inhomog eneity of the magnetic field; purification
