ABSTRACT Vortexing in continuous slab casting can entrain mould powder and thus damage the slab quality. In this investigation, a 0.4-scale water caster has been employed to explore the interaction between air and vortices. Black sesame seeds are injected into the water to get the better visualisation of air-vortex interaction. Momentum exchange between ascending air bubbles and vortexing has caused variations in both frequencies and characteristics of the vortices. SEN port clogging would introduce multiphase flow asymmetry. The consequence of the multiphase flow asymmetry on air bubbles sizes is explained. In order to reconcile the observations of water model experiments, mould powder entrained sliver data has been collected for analysis. ROCK clustering algorithm is applied on this data set. The largest cluster produced by the algorithm represents the data combination of shallow submergence depth, high casting speed and high value of SEN operation duration. This result is in perfect tune with the observations of multiphase water flow experiments.

中文翻译：

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板坯连铸机模具中的多相涡流模式：空气涡流相互作用和设备数据分析的见解

摘要 板坯连铸中的涡流会夹带结晶器粉末，从而损害板坯质量。在这项调查中，使用 0.4 级水铸机来探索空气和涡流之间的相互作用。将黑芝麻注入水中，以获得更好的空气涡流相互作用可视化效果。上升气泡和涡流之间的动量交换导致了涡流频率和特征的变化。SEN 端口堵塞会导致多相流不对称。解释了多相流不对称对气泡大小的影响。为了协调水模型实验的观察结果，收集了霉菌粉末夹带的棉条数据进行分析。ROCK 聚类算法应用于该数据集。该算法产生的最大簇代表了浅浸没深度、高抛速和高SEN操作持续时间值的数据组合。该结果与多相水流实验的观察结果完全一致。