群体建筑环境中的风能利用研究

WIND-POWER UTILIZATION RESEARCH ABOUT GROUP BUILDINGS IN BUILT ENVIRONMENT

采用计算流体力学的方法,对不同平面、立面布局下高层建筑群周围的风环境进行模拟。确定由5座高层建筑组成的7种不同形式的平面布局,检验行人舒适度,分析不同风向下建筑物侧排风速的变化;研究两座串联布置的高层建筑的风场分布,分析建筑的高差、间距、宽度改变对目标建筑屋顶风速的影响。研究结果表明:不同风向下侧排风能最大的布局不同,0°风向时风能最大布局为反V型,最小为正V型;影响目标建筑屋顶风速的本质因素是前置建筑的来流分离点与目标建筑屋顶前沿连线与水平线所成的角度。从建筑环境中风能利用的角度,为城市规划以及高层小区建筑布局提供理论参考和依据。

With the aid of the computational fluid mechanics method, the numerical simulation was implemented on wind field around buildings in different kinds of plane and vertical layout. Seven different kinds of plane layout were made by five high-rise buildings. The pedestrian comfort was checked and the velocity change along the side of the building was analyzed in different wind direction. The wind field distribution of two buildings in series was studied and the influence to the velocity on the roof of target building was analyzed, by changing the building elevation difference, spacing and width. The results show that the plane layout which has the most wind-energy capacity is different in different wind direction and the type of negative V is best, while the type of V is worst when wind direction is 0~. The angle between the horizontal line and the hne which contacts the flow separation point of front building and the forefront on the roof of target building affects the velocity on the roof of target building directly. On the perspective of wind-energy utilization, theoretical reference and foundation are provided about city planning and architectural layout of high-rise building community.