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以气一固两相的动量、热量、物质守衡为基础,用多流体模型描述气体和颗粒两相的运动,用气相湍流模型和颗粒湍流代数模型分别描述气相和颗粒相的湍流特性,建立了高炉局部富氧喷煤直吹管内气-固两相流动及传热的数学模型.数值模拟了9种工况下的气相流场、温度场以及煤粉颗粒相的速度场、浓度场和温度场,并研究了富氧率、风温、固气比、插枪角度等喷吹参数对各种场量的影响.数值模拟结果与实测值符合良好.
The multi-fluid model is used to describe the movement of gas and particle phases based on the momentum, heat and mass balance of gas, solid and gas phases. The turbulent characteristics of gas phase and particle phase are described by the gas phase turbulence model and the particle turbulence algebraic model, respectively The mathematical model of gas-solid two-phase flow and heat transfer in a blast furnace partially oxygen-enriched direct injection pipe was used to simulate the gas flow field, temperature field and the velocity and concentration fields of coal particles in nine conditions Temperature field and the effect of injection parameters such as oxygen enrichment rate, air temperature, solid-gas ratio and gun angle on various fields were studied.The numerical results agree well with the measured data.