摘要
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%。
Mathematical model of regenerative reheating furnace based on imaginary plane zone method was developed in which non-gray radiation properties of gas were considered. Equations were coupled to obtain the solutions. Total radiative exchange areas, heat flux to slab surface, temperature distribution and total heat exchange factor along length of a walking beam regenerative reheating furnace were simulated, with which the results of grayness of gas were compared. The results show that the mathematical model can correctly calculate the heat flux and temperature field, which can be done fast due to the simplicity. Grayness of gas can cause errors, and the errors of total radiative exchange areas, heat flux to slab surface, temperature distribution and total heat exchange factor can respectively reach 69.36%, 6.46%, 4.93% and 23.80%.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2009年第17期5345-5348,共4页
Journal of System Simulation
基金
国家重点基础研究发展规划项目(2006CB601203)
关键词
蓄热式加热炉
非灰辐射
假想面
区域法
灰体
regenerative reheating furnace
non-gray radiation
imaginary plane
zone method
gray gas
作者简介
崔苗（1980-），女，辽宁鞍山人，博士生，研究方向为热过程数学模型等；
陈海耿（1944-），男，福建龙海人，硕士，博导，研究方向为热过程数学模型及其在线控制，辐射换热模型等。
