摘要
基于二维k-ε湍流模型,分析了不同城市建筑架空层结构对街道峡谷模型内部的气流分布及汽车尾气污染物扩散的影响。结果表明:设置架空层有利于街道峡谷内污染物的扩散。架空层布置结构不同,影响程度存在差异,单边设置架空层时,在风来流方向设置架空层比在背风方向上设置效果好;最有利的情况为街道两旁同时设置架空层。研究结果可为城市的合理规划提供参考。
Based on the CFD simulation,the impacts of ground open floor on flow field distribution and vehicle exhaust dispersion inside an isolated street canyon were studied.The numerical simulation results revealed that open floor was good at contamination diffusion in the street canyon.The diffusion effect of setting open floor in the direction of wind flow is better than that in the leeward direction.The most favorable situation is that open floor is set on both sides of the street.The research results could provide reference for urban planning.
作者
贺广兴
HE Guang-xing(Hunan University of Humanities,Science and Technology School of Energy,Mechanical and Electrical Engineering,Loudi Hunan 417000,China)
出处
《环境科学导刊》
2022年第5期45-48,35,共5页
Environmental Science Survey
基金
湖南省教育厅项目(21C0768)。
