河南焦作市通风廊道的分析与构建

Analysis and Construction of Ventilation Corridor in Jiaozuo,Henan Province

城市大气污染日益严重,城市通风廊道有助于大气污染物的扩散,改善大气环境。计算流体力学可对不同速度场、质量浓度场等流场进行分析、计算和预测,实现对风速、大气颗粒污染物、建筑物密度等因素的模拟。以传统工业型城市河南焦作为例,通过分析大气颗粒污染物的时空分布,确定污染集中地及主要影响空间;结合城市风玫瑰图和绿色基础设施,识别出盛行风入城风口地带和识别氧源补给地;利用计算流体力学模拟确定潜在的通风廊道;通过换气平衡,识别潜在氧源补给廊道。基于计算流体力学的通风廊道分析方法,能为城市通风廊道的构建提供有益参考。

Urban air pollution is becoming more and more serious, and urban ventilation corridors help the diffusion of air pollutants and improve the atmospheric environment. Computational uid dynamics can analyze, calculate and predict flow fields such as different velocity fields and mass concentration fields, and realize the simulation of wind speed, atmospheric particulate pollutants, building density and other factors appropriately. The study takes Jiaozuo, a traditional industrial city in Henan province, as an example. Firstly, through the spatial and temporal distribution of atmospheric particulate pollutants, the pollution concentration and the main impact space are determined. Secondly, based on the urban wind rose map and green infrastructure, the prevailing wind entering the city tuyere zone and the oxygen supply area were identified. Then, computational uid dynamics simulation was used to determine the potential ventilation corridors. Finally, identify potential oxygen supply corridors through ventilation balance. The analysis method of ventilation corridor based on computational uid dynamics can provide a useful reference for the construction of urban ventilation corridors.