Purpose

The reported mathematical models of gas–liquid flow in single snorkel Rheinstahl–Heraeus (SSRH) are based on the assumption of steady Ar-molten steel flow. The purpose of this paper is to develop a mathematical model to describe the unsteady turbulent flow (CO-Ar-molten steel) with nonequilibrium decarburization reaction.

Design/methodology/approach

On the base of the finite volume method, the computational fluid dynamics software CFX is used to predict the unsteady fluid flow, the spatial distributions of CO/argon gas and carbon element. The water model experiment and the industrial experiment are carried out to verify the mathematical models.

Findings

A two-way coupling model (T-WCM) based on algebraic slip model is developed to investigate the coupling phenomena. The related results show that T-WCM is more rigorous and accurate than one-way coupling model in predicting carbon content of molten steel. The amount of CO gas, which can enhance turbulent flow and mass transfer, is about three times the argon gas blown into SSRH.

Originality/value

CO gas is the key factor in investigating the transport phenomena. This study fully reveals the truth about the unsteady gas-liquid flow in SSRH. It is necessary to adopt T-WCM based on algebraic slip model to describe the CO-Ar-molten steel flow phenomenon.

中文翻译：

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单通气管 RH 中具有非平衡化学反应的湍流

目的

已报告的单通气管 Rheinstahl-Heraeus (SSRH) 中气液流动的数学模型基于稳定的 Ar 熔钢流动假设。本文的目的是建立一个数学模型来描述具有非平衡脱碳反应的不稳定湍流（CO-Ar-熔融钢）。

设计/方法/方法

在有限体积法的基础上，利用计算流体动力学软件CFX预测非定常流体流动、CO/氩气和碳元素的空间分布。通过水模型实验和工业实验对数学模型进行验证。

发现

开发了一种基于代数滑移模型的双向耦合模型 (T-WCM) 来研究耦合现象。相关结果表明，T-WCM在预测钢水含碳量方面比单向耦合模型更加严谨和准确。可以增强湍流和传质的 CO 气体量大约是吹入 SSRH 的氩气的三倍。

原创性/价值

CO 气体是研究​​传输现象的关键因素。本研究充分揭示了SSRH中气液非定常流动的真相。有必要采用基于代数滑移模型的T-WCM来描述CO-Ar-钢水流动现象。