Details

Autor(en) / Beteiligte

• Xie, Xiaomin
• Zhu, Zhongwei

Titel

Effects of Heat Intensity and Inflow Wind on the Reactive Pollution Dispersion in Urban Street Canyon

Ist Teil von

• Shanghai jiao tong da xue xue bao, 2018-12, Vol.23 (Suppl 1), p.109-116

Ort / Verlag

Shanghai: Shanghai Jiaotong University Press

Erscheinungsjahr

2018

Quelle

SpringerNature Journals

Beschreibungen/Notizen

• This paper investigates the impacts of heating intensity and inflow wind speed on the characteristics of reactive pollutant dispersion in street canyons using the computational fluid dynamic (CFD) model that includes the transportation of NO, NO 2 , and O 3 coupled with NO-NO 2 -O 3 photochemistry. The results indicated that the heat intensity and inflow wind speed have a significant influence on the flow field, temperature field and the characteristics of reactive pollutant dispersion in and above the street canyon. With the street canyon bottom heating intensity increasing, NO, NO 2 and O 3 concentrations in street canyon are decreased. The O 3 concentration reductions are even more than the NO and NO 2 concentrations. Improving the inflow wind speed can significantly reduce the NO and NO 2 concentrations within street canyons. But the O 3 concentrations have a slight rise with wind speed increasing. The results would be useful for understanding the interrelation among reactive vehicle emissions, and provide references for urban planners.