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首页> 外文期刊>Steel Research International >The Influence of Swirl Flow on the Flow Field, Temperature Field and Inclusion Behavior when Using a Half Type Electromagnetic Swirl Flow Generator in a Submerged Entry and Mold
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The Influence of Swirl Flow on the Flow Field, Temperature Field and Inclusion Behavior when Using a Half Type Electromagnetic Swirl Flow Generator in a Submerged Entry and Mold

机译:浸入式模具中使用半型电磁旋流发生器时旋流对流场,温度场和夹杂行为的影响

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摘要

In the preceding work, the inclusion behavior in a submerged entry nozzle (SEN) and mold induced by using a swirl flow has been investigated. The results showed that a swirl flow can effectively promote the inclusions removal to the meniscus as well as reduce the inclusions entrapment at the solidified shell wall. Moreover, that the swirl flow was generated by using a full type electromagnetic swirl flow generator (EMSFG). In the present work, a kind of a half type EMSFG was investigated, since it is easier to implement in a production scale. The influence of the stirrer on the fluid flow, heat transfer, and inclusion behavior in the SEN and mold was studied. Furthermore, a comparison between these two types of EMSFG from the aspects of flow field, temperature field, and inclusion behavior was done. In addition, the effect of different magnetomotive forces, inclusion sizes, densities as well as boundary conditions on the inclusion behavior was studied. The results show that the effect of a half type EMSFG (88000 AT) on the molten steel is very close to a full type case (44000 AT). More specifically, the flow pattern, temperature distribution as well as inclusion behavior in the SEN and mold look very similar. Also, it was found that from the viewpoints of the inclusions separation to the mold meniscus and the inclusions trapping at the solidified shell wall, better results could be obtained for a "Trap" boundary condition when using half type EMSFGs.
机译:在前面的工作中,已经研究了利用旋流引起的浸入式喷嘴(SEN)和铸模中的夹杂行为。结果表明,旋流可以有效地促进夹杂物向弯液面的去除,并减少夹杂物在凝固壳壁的滞留。而且,旋流是通过使用全型电磁旋流发生器(EMSFG)产生的。在目前的工作中,研究了一种半型EMSFG,因为它更易于在生产规模上实施。研究了搅拌器对SEN和模具中流体流动,传热和夹杂行为的影响。此外,从流场,温度场和夹杂行为方面对这两种类型的EMSFG进行了比较。此外,研究了不同的磁通势,夹杂物尺寸,密度以及边界条件对夹杂物行为的影响。结果表明,半型EMSFG(88000 AT)对钢水的影响非常接近全型外壳(44000 AT)。更具体地说,SEN和模具中的流型,温度分布以及夹杂行为看起来非常相似。而且,发现从夹杂物分离到模具弯月面和夹杂物在凝固的壳壁处截留的观点,当使用半型EMSFG时,对于“诱捕”边界条件可以获得更好的结果。

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