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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
The k ε equation was used to simulate the flow field and temperature distribution in the waste heat boiler. Geometric topology with multiple structures to reduce the waste of computer memory, with body coordinate system to describe complex geometric boundaries, grid system with staggered grid. Diffusion terms and source terms are discretized using the second-order central difference method, and a hybrid difference (HDS) format is used for the dispersion of the convection terms of the governing equations. Solve equations using the SIMPLE algorithm. The distribution of the flow field and the temperature field in the waste heat boiler is given, which provides a theoretical basis for studying the flow, heat transfer and mass transfer in the waste heat boiler, and provides detailed data and effective measures for the design and energy saving of the waste heat boiler