基于CFD方法的城市楼宇风场模型研究

Research on Urban Building Wind Field Modeling Based on CFD Method

摘要: 近年来，随着经济和社会的发展我国城市化进程发展迅猛，但国内对城市楼宇风灾的研究亟待加强。本文以上海市某区域为例，采用计算流体力学(CFD)方法对城市楼宇风场进行模拟分析。结果表明，楼宇周围的绕流风场比较复杂，楼宇之间存在明显的干扰效应；相邻楼宇间存在明显的“狭管效应”，也导致了风速增大。下游楼宇由于受到上游楼宇的“遮挡”，其尾流区存在明显的风速减弱现象。最后通过现场实测的方式验证了模型的可靠性并进行了优化。

Abstract: In recent years, with the development of the economy and society, China’s urbanization process has advanced rapidly, but research on wind disasters in urban buildings remains urgently needed. Taking a certain area in Shanghai as an example, this paper employs computational fluid dynamics (CFD) to simulate and analyze urban building wind fields. The results indicate that the flow field around buildings is relatively complex, with significant interference effects between adjacent structures. A notable “funneling effect” occurs between neighboring buildings, also leading to increased wind speeds. Downstream buildings experience a significant wind speed reduction in their wake due to the “blockage” effect from upstream structures. Finally, the model’s reliability is verified through field measurements, followed by optimization.