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 Nozzle and Mold
2015 (English)In: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344X, Vol. 86, no 11, 1312-1327 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2015. Vol. 86, no 11, 1312-1327 p.
Inclusion behavior, swirl flow, half type EMSFG, rotating magnetic field, submerged entry nozzle
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-175988DOI: 10.1002/srin.201400330ISI: 000363679600010ScopusID: 2-s2.0-84945443211OAI: oai:DiVA.org:kth-175988DiVA: diva2:864328
QC 201510262015-10-262015-10-262015-11-20Bibliographically approved