RH真空精炼吹氩参数对循环流动影响的数值分析

Simulation of Vacuum Ruhrstahl-Heraeus-Degassing at Different Gas Circulation Flow Rates

为研究RH真空脱气过程中的流动行为,建立了描述气泡驱动下的RH循环气-液两相流动的数学模型。基于欧拉-欧拉两流体模型,利用计算流体力学(CFD)商业软件FLUENT6.0,对不同充气量条件下的循环流量进行了预测。计算结果与实验数据的比较表明两者具有较好的一致性。应用该模型对充气压强与循环流量、充气量与上升管内气相及液相速度分布关系进行了数值模拟,用以理解其中的流动规律,为工程技术改进提供参考。

A novel two-phase flow model was developed to numerically simulate the behavior of Ruhrstahl-Heraeus （RH） degassing, driven by gas bubbles. To predict the circulation flow rates, the simulation of R_H degassing under the conditions of different driving gas flow rates was done on the basis of Eulerian-Ettlerian approach, with the commercial available software package, computation fluid dynamic （CFD） code FLUENT6.0. The simulated results agree fairly well with those of the experiment, especially when it comes to the impacts of the gas inlet pressure, liquid/gas velocity distributions and gas flow rate, on the circulation flow rate.