Highly resolved measurement and simulation of gas jet impingement onto a free metal melt surface

在BOF工艺中生产粗钢时，氧气通过拉瓦尔喷嘴吹入生铁熔体中。该项目旨在研究超音速气流和熔融金属浴之间相互作用的细节。重点是自由熔体表面的瞬态行为，金属液滴的形成和与复杂结构的气体流场的相互作用。在一个新的模型实验中，时间分辨的大规模PIV测量的熔体表面和气体流动的纹影测量。瞬态多相流的CFD模拟包括熔融金属，气体在超音速和亚音速区域，以及金属液滴完成和补充的调查。重要的参数以及工艺、材料和流量之间的关系应通过对测量结果和模拟数据的评估来确定。

In the production of crude steel in the BOF process, oxygen is blown into the pig iron melt via a Laval nozzle. The proposed project aims to investigate details of the interactions between the supersonic gas flow and the molten metal bath. The focus is on the transient behavior of the free melt surface, the formation of metal droplets and the interactions with the complex structured gas flow field. In a new model experiment, time-resolved large-scale PIV measurements of the melt surface and also Schlieren measurements of the gas flow are performed. CFD simulations of the transient multiphase flow consisting of molten metal, gas in the supersonic and subsonic areas as well as the metal droplets complete and complement the investigations. Important parameters and relationships between process, material and flow quantities should be determined from the evaluation of measurement results and simulation data.