中间辐射体对加热炉内传热过程影响的数值模拟

针对黑体定向辐射技术节能的机理问题，以实验室规模具有中间辐射体的室状加热炉为研究对象，建立了具有中间辐射体的物理模型，以CFD商业计算软件Fluent建立平台计算黑体定向辐射条件下的气体流动、传热、燃烧的三维耦合数学模型，并根据实验结果对数学模型进行验证.研究结果表明:中间辐射体的加入改变了炉体燃烧室内的流动情况及炉墙对钢坯固体辐射的比表面积，分别从气体辐射及固体辐射角度增强了钢坯表面辐射换热强度，燃烧温度降低20K左右，钢坯加热速度提升16.7%，钢坯表面最高温度提升40K.加热效率的提升带来了更好的节能效果.

Numerical Simulation of Influence of Intermediate Radiator on Heat Transfer Process in Heating Furnace

The energy-saving mechanism of blackbody directional radiation technology was investigated. Based on a chamber heating furnace with an intermediate radiator in a steel plant， a physical model with intermediate radiators was established. A transient 3-D mathematical combustion model coupled with heat transfer and fluid flow in the furnace was developed based on the CFD commercial software Fluent to simulate the combustion and temperature distribution in the furnace. The model was verified according to experimental results. The research results show that the installation of the intermediate radiators changes the flow pattern in the combustion chamber of the furnace and the view factor of the furnace wall to the slab for solid radiation， and enhances the radiant heat transfer intensity of the slab surface for both gas radiation and solid radiation. The combustion temperature is reduced by about 20K， the slab heating speed is increased by 16.7%， and the highest temperature of the slab surface is increased by 40K. The improvement of heating efficiency brings a better energy-saving effect.