(中南工业大学物热系，长沙410083)
摘 要: 用k-ε方程模拟了余热锅炉内流场和温度场分布。几何拓扑结构用多块结构以减少计算机内存的浪费，用贴体坐标系统来描述复杂的几何边界，网格系统用交错网格。使用二阶中心差分法离散扩散项和源项，对于控制方程的对流项的离散采用混合差分(HDS)格式。求解方程使用SIMPLE算法。给出了余热锅炉内流场和温度场的分布，为研究余热锅炉炉内流动和传热、传质提供了理论依据，对余热锅炉的设计、节能改造提供了详细的数据和有效手段。
关键字: 余热锅炉；流场；温度场；数值计算
（Department of Applied Physics and Heating Engineering,
Central South University of Technology, Changsha 410083, P.R.China）
Abstract:The flow and temperature fields in the waste boiler have been simulated. The computing method is SIMPLE method. The multi-block grid methodology involving unstructured set of block was used, and the Body-Fitted grid was specified in the simulation. The method of discretization of diffusion terms and source terms in the control equations is central differencing (CDS), and the method of discretization of advection terms in the control equations is Hybrid Differencing(HDS). The computation results described by the distribution of the velocity and temperature are good in accordance with phenomena observed in prototypes. The simulation re, sults can be used in design of waste boiler.
Key words: waste boiler; numerical calculation; flow field; temperature field
