某船用锅炉过热器蒸汽与烟气传热流动数值模拟

Numerical Simulation of Steam and Flue-gas Heat Transfer Flows in a Marine Boiler Superheater

对某船用锅炉过热器内部蒸汽与外部烟气的湍流流动、传热进行了整体的三维数值模拟。针对该船用锅炉过热器的结构特点,应用Gambit专业软件对其进行三维几何建模和网格划分。应用Fluent软件进行数值模拟,得出蒸汽流场的静压分布规律、流量分配规律、热负荷分布规律和过热器管壁温度场的分布规律。模拟结果与过热器的实际运行工况符合较好。对船用锅炉过热器的结构设计有重要的参考价值。

An integral three-dimensional numerical simulation was conducted for the turbulent flow of inner steam and outer flue gases of a marine boiler superheater.In the light of the structural features of the superheater,a special software Gambit was used to conduct a three dimensional geometric modeling and mesh division.A numerical simulation was performed by using software Fluent.A variety of distribution laws governing the steam flow fields were obtained,including the distribution of static pressure,flow rate and heat load as well as superheater tube-wall temperature field distribution.The simulation results are in relatively good agreement with the actual operating conditions of the superheater,thus providing valuable guidance for the structural design of marine boiler superheaters.