两个相邻建筑物周围风环境的数值模拟

Numerical simulation of wind environment around two adjacent buildings

高层建筑物及其群体周围所引起的风环境问题正日益受到人们的重视。本文用数值模拟方法对两幢串列布置高层建筑周围的流场进行了模拟 ,讨论了建筑物高度、间距比等因素对风环境特性的影响。为了与两个相邻建筑物的流场进行比较 ,本文同时计算了单个建筑物周围流动的分布情况。数值模拟结果对揭示高层建筑群区域内再生风载荷的形成机理提供了一定的分析方法 。

Numerical simulations of time averaged Navier-Stokes equations are carried out to investigate the wind field around two tall buildings in the tandem arrangement, by using a k-Ε two-equation turbulence model, with suitable boundary conditions for the flow. The influence of the height and spacing of adjacent buildings on the wind environment is emphasized. The flow patterns around the buildings at several configurations are visualized by the streamlines. The velocity profiles at different positions are compared each other. Numerical results given here also enhance the understanding of the wind load mechanism in the zone of high-rise buildings. Furthermore, The results also provide the useful guidelines and references to a certain extent for city planning and designing.