(上海大學(xué) 上海市鋼鐵冶金國家重點(diǎn)實(shí)驗(yàn)室，上海 200072)
摘 要: 使用金屬鎵液對(duì)交變磁場作用下的金屬液紊流現(xiàn)象進(jìn)行了直接觀察，并對(duì)相應(yīng)的成因進(jìn)行了探討，結(jié)果發(fā)現(xiàn)交變磁場中磁場分布不均勻是引起紊流的根本原因。提出采用磁場分布不均度參數(shù)來衡量磁場不均勻性，該參數(shù)的提出為電磁凈化器的設(shè)計(jì)和提高凈化效果提供了理論依據(jù)。為了探討控制紊流的方案，還采用了模擬體系，研究了不同截面形狀的管型及不同磁感應(yīng)分布不均度下顆粒的遷移規(guī)律，并分析了管型影響紊流形成的原因。
關(guān)鍵字: 交變磁場； 紊流； 磁感應(yīng)強(qiáng)度分布不均度； 凈化
purified by alternating magnetic field
JIANG Guo-chang, XU Kuang-di
（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
