复杂树状结构 CFD 数值仿真研究

Based on the engineering background of Huafa Art Museum in Zhuhai, the complex tree-shaped structures in the museum were numerically simulated by the means of computational fluid dynamics method( CFD) through constructing appropriate numerical wind tunnel model on numerical platform. By using turbulence model( RANS) in the simulation, the wind pressure distributions on the tree crown of each tree-shaped structure and wind environment conditions on the pedestrian level in the main building of the museum were emphatically discussed,and a comparison about the wind pressure distribution on the tree crown of two typical tree-shaped structures was made between numerical predictions and wind tunnel test results. The results indicate that numerical simulation method can accurately predict the wind pressure distribution on complex tree-shaped structures as well as the flow field information in the museum; the wind pressure distribution on each tree crown is mostly interfered by neighboring tree structures and the museum, which is particularly evident on the higher tree-shaped structures; combining with the meteorological data in Zhuhai, the general wind environment of the museum is considered to be favorable except that the wind speed ratio in some regions is comparatively bigger because of the channeling effect.