基于计算流体方法对建筑物风场分布

为了对建筑物整体风场进行定量定性分析,为建筑物设计提供参考和依据,利用计算流体力学构建了建筑物的风场模型,并对行人舒适性进行了评估.建立了单一建筑、多建筑及城市综合体风场的CFD模型,并将模型计算结果与风洞试验进行对比,验证模型的正确性和可行性.对比不同湍流模型计算结果,得出了不同情况下最优湍流模型.试验研究发现,标准RSM模型适用于计算单一建筑和小群建筑风场分布,而对于城市综合体风场的计算则以RSM-壁面反射模型为最优.本研究为通过模拟计算定性、定量评估建筑物周围风场提供了依据.

Wind field distribution of buildings based on computational fluid method

In order to provide quantitative and qualitative analysis of whole wind field of buildings and provide the reference and basis for the design of buildings, the building wind field model was established with the computational fluid dynamics, and then the pedestrian comfort was evaluated. The CFD model for the wind field of single building, multiple buildings and urban complex was established, and the model calculation results were compared with the wind tunnel test to verify the correctness and feasibility of the model. In addition, the results of different turbulence models were compared, and the optimal turbulence model was obtained under different conditions. It is found that the standard RSM model is suitable for calculating the distribution of wind field in the single building and small group of buildings, while the RSM-wall reflection model is the best model for the urban complex wind field. This study provides a basis for the qualitative and quantitative assessment of wind field around the buildings through the simulation calculation.