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考虑加热炉内炉气的非灰辐射特性,应用引入假想面的区域法,建立蓄热式加热炉数学模型,将各个方程相互耦合进行数值求解。以某轧钢厂的一座步进梁蓄热式加热炉为研究对象,对各辐射全交换面积、钢坯表面热流、炉内温度场和炉膛总括热吸收率进行模拟计算,并与炉气简化为灰体时的计算结果进行比较。结果表明,模型可用来预测蓄热式加热炉内的热流场和温度场,假想面的引入使计算量大大减小,收敛速度较快;在本研究条件下,将炉气简化为灰体时,辐射全交换面积、钢坯表面热流、炉内温度场和炉膛总括热吸收率的误差分别可达69.36%、6.46%、4.93%和23.80%。
Considering the non-ash radiation characteristics of the furnace gas in the furnace, a mathematical model of the regenerative furnace was established by using the method of region introducing the hypothetical surface. The equations were coupled to solve the problem numerically. Taking a walking beam regenerative heating furnace of a rolling mill as the research object, the full radiation exchange area, the surface heat flux, the temperature field in the furnace and the total heat absorption rate of the furnace were simulated and compared with the furnace gas simplified as ash Body time calculation results are compared. The results show that the model can be used to predict the heat flow field and the temperature field in the regenerative furnace. The introduction of the imaginary plane greatly reduces the computational load and the convergence speed. Under the conditions of this study, , The error of the full radiation exchange area, the surface billet heat flow, the temperature field in the furnace and the total heat absorption rate of the furnace can reach 69.36%, 6.46%, 4.93% and 23.80% respectively.