蓄热式连续推钢加热炉内钢坯加热过程动态数值模拟

基于商业软件CFX4.3和自编程序，建立了一套CFD模拟系统，并以新钢公司80 t/h蓄热式加热炉为对象，对其进行适当简化的三维动态数值模拟研究，分析了钢坯在炉内的加热过程，并与生产记录数据和现场测试进行对比. 结果表明，蓄热式加热炉能获得较好的流场和温度场分布，钢坯出炉前温度达到1460 K以上，钢坯内各节点的温差不超过10 K，基本满足高效、低耗的钢坯加热工作需要. 但本研究的蓄热式加热炉在生产条件下的温度制度仍存在一定的不合理之处，钢坯离开加热段进入均热段时其表面平均温度为1350 K左右，均热段大部分时间内钢坯仍在被加热，影响均热效果，在今后设计和操作加热炉时应加以改进.

Transient Numerical Simulation on the Billet Heating Process of a Regenerative Reheating Furnace

Based on commercial software CFX4.3 and some self-programming codes, a three-dimensional CFD simulation system for simulating thermal process in a regenerative continuous heating furnace was developed. The entrancement, combustion and billet heating process in a 80 t/h regenerative reheating furnace of Xinyu Iron and Steel Company were analyzed numerically, and the computational results were compared with production records and onsite measurements, which verified the practicability of this CFD system. The results indicate that the flow pattern and distribution of temperature in the regenerative reheating furnace are favorable to satisfy the high quality requirements of reheating, where the terminal heating temperature of billets is more than 1 460 K and the temperature difference between each node is not more than 10 K. But since the surface average temperature of blUets leaving heating zone is only about 1350 K and continued heating is needed in soaking zone, the design and operation of current state are still necessarily optimized to improve the temperature schedule of billet heating.