Study on the Influence of the Street Side Buildings on the Pollutant Dispersion in the Street Canyon

摘要: Abstract Numbers of high-rise buildings form the street canyon, in which exhaust vehicles accumulate and do harm to urban residents. So study on pollutant dispersion characteristics influence factors emission city streets is great significance. This paper analyses emissions, gets numerical simulation building's roof shape both sides influences relative height canyon air flow field diffusion concentration field. The results show that with increase height, vehicle emissions a downward trend leeward windward surface, pollutants at top obviously less than affected by traffic street. this article can provide scientific basis about control, monitoring estimate from vehicle, rational layout planning city's streets.