摘要
针对不同的城市街道峡谷结构形状,通过求解二维不可压缩N-S方程和K-ε湍流模型方程及污染物对流扩散方程,数值模拟了街道峡谷内的流场及机动车排放污染物浓度场,从而说明了街道峡谷的结构是影响街道峡谷内污染气体扩散的主要因素之一。
Pollutant contamination of an urban street canyon was investigated by numerical simulation.The urban street canyon was simulated by two buildings parallel to each other and perpendicular to the wind.The influence of the following parameters was studied:the different ratio between the heights of the upstream and downstream buildings in a street canyon with the certain spacing between the canyon.A strong influence of the ratio of buildings heights on the pollutant dispersion in the street canyon was observed,the ratio of buildings heights turned out to be important to the pollutant dispersion of an urban street canyon.
出处
《城市环境与城市生态》
CAS
CSCD
北大核心
2004年第3期18-20,共3页
Urban Environment & Urban Ecology
基金
国家自然科学基金资助项目(70371011)
上海市青年基金资助项目(02G22)
关键词
街道峡谷
流场
污染物浓度
street canyon
flow field
pollutant concentration
