高层建筑群风场的数值分析

针对高层建筑物风场和风压力的问题，采用计算流体动力学（CFD）软件对高层建筑物进行模拟，得出了单个建筑物在不同风向下的风场和风压力，并对高层建筑群进行了模拟，将其分布规律与单个建筑物进行了比较，结果表明，风在受到第一个阻碍后的区域里的漩涡分布最强烈，压力梯度最大，是最危险的受力区，在建筑群中，最靠近迎风面的建筑物所受负压最大，且建筑物之间的间距也对风场有很大影响，因此研究结果对于减少高层建筑物中大尺度的漩涡脱离区，以及降低室内噪声具有指导价值，同时也显示了CFD技术强大的分析能力及其在工程应用领域中的广阔前景。／

Numerical Analysis of the Wind Field on High Buildings

The wind field of high building was computed numerically. Isolated building in wind from different direction was simulated first.Then the interaction between bulidings are studied in detail. It is shown that the eddy vorticity and the pressure gradient has a local maximum in the first area that the wind is blocked, which is also the most dangerous place. Among the buildings, the first building which is facing on coming wind suffers the largest pressure, and the distance between buildings also has large influence on the wind field. These results can help us to reduce the large sacle wind field separation and suppress the wind noise. It can also display the powerful capability of CFD code for the wind field simulations of high buildings.