Numerical Simulation of Flow Field in Tangentially Fired Boiler Using Different Turbulence Models and Discretization Schemes
YOU Chang fu 1, QI Hai ying 1, XU Xu chang 1, Bernard Baudoim 2 (1. Dept. of Thermal Engrg., Qinghua Univ., Beijing 100084, China; 2. Dept. of Energy Industry, Ecole Des Mines De Douai, Douai 59508, France)
Different turbulence models provided by commercial software FLUENT, which include K ε model, RNG K ε model, RNG K ε model with swirl modification, Realzable K ε model, Reynolds Stress model, have been used to simulate the strong swirl flow field in tangentially fired boiler. To reduce the influence of the numerical diffusion on the computational results, some measures, such as decreasing the grid size and increasing the order of the discretization scheme, have also been used. The qualitative agreement between computational results and experimental data has been achieved. However, three are obvious quantitative differences. The results obtained with Realizable K ε model and QUICK scheme have a littel better concord with the experimental data than that with other models and discretization schemes, respectively. Figs 5 and refs 4.
【CateGory Index】： TK229.63