Influence of Aspect Ratio on Fluid Flow and Heat Transfer in Mould when Using Swirl Flow during Casting
2008 (English)In: STEEL RES INT, ISSN 1611-3683, Vol. 79, no 9, 698-707 p.Article in journal (Refereed) Published
Mathematical modelling was used to study the effect of a changed aspect ratio of a continuous casting mould on the resulting flow field in the upper part of the mould when using a swirl flow in the nozzle. Model predictions were initially compared to physical modelling data. More specifically, the predicted axial velocities were found to differ only at the most similar to 3 mm/s from the measured data. Thus, the model was concluded to be sound. By changing the aspect ratio of a billet mould from 1 to 3 systematically, a numerical analysis of the mould region of a billet continuous caster was performed with a novel injection concept using swirling flow in the immersion nozzle in order to control the heat and mass transfer in the continuous casting mould. The predictions showed that the aspect ratio of the mould has a large influence on the flow field in the upper part of the mould. The meniscus temperature was found to increase with an increasing aspect ratio from 1 to 2, but the maximum temperature was found to decrease when the aspect ratio was increased above 2.
Place, publisher, year, edition, pages
2008. Vol. 79, no 9, 698-707 p.
swirl flow, aspect ratio, billet mould, immersion nozzle, continuous casting of steel
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-14185DOI: 10.2374/SRI07SP116-79-2008-698ISI: 000260189700006ScopusID: 2-s2.0-53149128787OAI: oai:DiVA.org:kth-14185DiVA: diva2:331542
QC 201007232010-07-232010-07-232016-04-27Bibliographically approved