西安典型街区风环境数值模拟及城市优化设计策略研究

Digital Simulation of Wind Environment and Urban Optimization Design Strategy for Typical Blocks in Xi’an

城市街区空间形态与街区微气候要素耦合研究是改善城市空间微气候环境的前沿课题之一。论文选取西安典型街区进行空间形态解析,通过数值计算的途径提出高围合度和围合度两种建筑空间类型。利用Phoenics软件对街区空间进行风环境数值模拟。分别在两种围合度的地段内选取关键点进行风环境数值实测,并与计算机模拟数值进行相互验证。通过解析街区不同空间围合度产生不同的风环境效应,探索街区风环境与空间形态的内在关联性规律,并以此为基础提出优化街区风环境的城市设计策略。

When it comes to the microclimate environment creation, the study on the coupling between urban block spatial form and block microclimate elements is going to be the advanced fields of it. In this paper, by the morphological analysis of typical blocks in Xi'an, two kinds of architectural space types, high-enclosed and low-enclosed, are proposed by enclosure degree after numerical calculation. The numerical simulation results of wind environment in block space by using the PHOENICS are verified with that selected in on-site typical areas. The key points of two types of enclosed areas were for wind environment numerical measurement, and the results were verified with computer simulation. The analysis of different wind environment effects produced by spatial enclosure degree implies the internal correlation between the wind environment and the spatial block form, which can bring forward more urban design strategies to optimize the wind environment of blocks.