城市机动车尾气排放及道路扩散模式综述

Summary of Vehicle Emission and Diffusion Models in Typical Urban Streets

综述了国内外机动车排放因子模型,基于开阔型、交叉路口型和城市峡谷型3类城市典型交通道路,探讨了各种机动车尾气扩散模式的优缺点和适用性。提出今后的研究重点是利用城市生态系统中的植物群落对汽车排放污染物扩散的阻碍和吸附,探索绿化植物对机动车尾气污染扩散的阻散特征;加强CFD软件在城市道路空气质量研究领域的应用;在GIS平台下,结合扩散模式开发环境综合管理系统。

The emission factor models of vehicles at home and abroad were reviewed based on three typical types of open, intersection and urban gorge traffic. The advantages and disadvantages were discussed on different vehicle exhaust diffusion models. The research emphasis in the future would be on the barriers and adsorption of vehicle exhaust pollutants by plant communities of urban ecological system and explore the dispersion characteristics of vehicle exhaust pollution diffusion by green plants. It made the best of CFD software in research field of urban road air quality. In GIS platform, it was developed for integrated management system combined with the diffusion model.