Study on the influence of meteorological conditions and the street side buildings on the pollutant dispersion in the street canyon

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• 作者：Hao Zhang ; Tiantian Xu ; Yuxiang Wang ; Yuzhao Zong ; Shun Li…
• 关键词：urban street canyons ; vehicle emissions dispersion ; numerical simulation ; the buildings on street side ; meteorological conditions
• 刊名：Building Simulation
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：9
• 期：6
• 页码：717-727
• 全文大小：2,438 KB
• 刊物类别：Engineering
• 刊物主题：Building Construction, HVAC and Refrigeration
  Engineering Thermodynamics and Transport Phenomena
  Atmospheric Protection, Air Quality Control and Air Pollution
  Environmental Computing and Modeling
  Chinese Library of Science
  
• 出版者：Tsinghua University Press, co-published with Springer-Verlag GmbH
• ISSN：1996-8744
• 卷排序：9

文摘

As cities grow, automobile exhaust pollution is worsening, which has become a major problem of air pollution, even it is a serious threat to the physical and mental health of residents. Thus, to study its diffusion law and influential factors occupies a count for much position. The paper analyzes the factors that affect the dispersion of urban vehicle emissions in street canyon to evaluate the research method of pollutant dispersion. In addition, the influences of different wind speeds and wind directions, the roof shape of buildings on both street sides, and the relative height of the two sides of buildings on the street canyon, on airflow field and pollutant dispersion are simulated. It is shown that the wind speed, the wind direction and the buildings on both sides have a great impact on the airflow and contaminant dispersion in the street canyon. The results provide scientific basis for controlling, monitoring and evaluating the urban motor vehicle emissions, besides the reasonable layout and the programme of urban streets.