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

在转炉流程的粗钢生产中，氧气通过拉瓦尔喷嘴吹入生铁熔体。拟议的项目旨在研究超音速气流与金属熔池之间相互作用的细节。重点研究了自由熔体表面的瞬变行为、金属液滴的形成以及与复杂结构气体流场的相互作用。在一个新的模型实验中，对熔体表面进行了时间分辨的大规模PIV测量，并对气体流动进行了纹影测量。对熔融金属、气体在超音速和亚音速区域以及金属液滴组成的瞬变多相流的CFD模拟是对研究的补充和补充。应通过对测量结果和模拟数据的评估来确定工艺、材料和流量之间的重要参数和关系。

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.