关键词: 风环境, 城市形态参数, 计算流体力学, 相关关系, 回归拟合方程

Abstract: Wind environment has a considerable influence on urban residents′ comfort,which is the focus of urban climate research. Taking Dongcheng District of Daqing City as an example, a wind environment assessment method based on CFD computational fluid dynamics） and urban morphology parameters was studied. First, the wind environment in the central area of the city was simulated by CFD software to obtain the wind speed nephogram. Then, the wind speed nephogram was divided into grids, and the regression equation between grid wind speed ratio and urban shape parameters was obtained by SPSS. Finally, the wind speed ratio of Dongcheng District was calculated by the regression fitting equation, and the wind environment was evaluated. Results show that sky openness and windward area density are the most important urban morphological parameters affecting the wind speed ratio, and the combination of multiple urban morphology parameters can explain the change in wind speed ratio better. Thus, by combining the wind speed ratio calculation equation and wind environment evaluation standard, the bad wind environment areas in a city can be found and relevant optimization suggestions can be proposed.

Key words: wind environment, urban form parameters, CFD; correlation, regression equation