| Numerical and Experimental Studies on Flow and Pollutant Dispersion in Urban Street Canyons |
| |
| 作者姓名： | 姜瑜君 姜瑜君 桑建国 张伯寅 |
| |
| 作者单位： | Department of Atmospheric Sciences, School of Physics, Peking University，Beijing 100871,The State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC)
Institute of Atmospheric Physics，Chinese Academy of Sciences, Beijing 100029,Department of Atmospheric Sciences, School of Physics, Peking University，Beijing 100871,State Key Laboratory of Turbulence Research, Peking University, Beijing 100871 |
| |
| 摘 要： | In this study numerical simulations and water tank experiments were used to investigate the flow and pollutant dispersion in an urban street canyon. Two types of canyon geometry were tested. The studies indicate that in a step-up notch canyon （higher buildings on the downstream side of the canyon）, the height and shape of the upstream lower buildings plays an important role in flow pattern and pollutant dispersion, while in a step-down notch canyon （lower buildings on the downstream side）, the downstream lower buildings have little influence. The studies also show that the substitution of tall towers for parailelepiped buildings on one side of the canyon may enhance the street ventilation and decrease the pollutant concentration emitted by motor vehicles.
|
| 关 键 词： | 城市街道峡谷 气流 污染物扩散 数值研究 水箱实验 |
| 收稿时间： | 2005-11-08 |
| 修稿时间： | 2006-06-02 |
Numerical and experimental studies on flow and pollutant dispersion in urban street canyons |
| |
| Jiang?Yujun,Liu?Huizhi,Sang?Jianguo,Zhang?Boyin.Numerical and Experimental Studies on Flow and Pollutant Dispersion in Urban Street Canyons[J].Advances in Atmospheric Sciences,2007,24(1):111-125. |
| |
| Authors: | Jiang Yujun Liu Huizhi Sang Jianguo Zhang Boyin |
| |
| Abstract: | In this study numerical simulations and water tank experiments were used to investigate the flow and pollutant dispersion in an urban street canyon. Two types of canyon geometry were tested. The studies indicate that in a step-up notch canyon (higher buildings on the downstream side of the canyon), the height and shape of the upstream lower buildings plays an important role in flow pattern and pollutant dispersion,while in a step-down notch canyon (lower buildings on the downstream side), the downstream lower buildings have little influence. The studies also show that the substitution of tall towers for parallelepiped buildings on one side of the canyon may enhance the street ventilation and decrease the pollutant concentration emitted by motor vehicles. |
| |
| Keywords: | urban street canyon numerical simulation water tank experiment pollutant dispersion |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《大气科学进展》浏览原始摘要信息 |
| 点击此处可从《大气科学进展》下载免费的PDF全文 |
