摘要
采用三维数值模拟的方法,对隧道峒口废气的扩散情况进行了预测和分析,揭示了在不同风速和风向条件下,峒口废气的扩散特征.计算结果表明,风速越高,废气离开峒口后,浓度衰减得越快;而横向风则会导致隧道两侧很大区域内的污染物浓度超标.因此,应采取有效措施,控制隧道峒口污染物的扩散.
A three-dimensional numerical simulation is used to predict the exhaust gas diffusion from a tunnel portal under different wind velocity and direction. The results show that the higher the wind velocity is, the faster the concentration of the pollutants will attenuate after the pollutants leave the tunnel portal;while the transversal wind will result in the higher concentration of pollutants in a large range around the tunnel portal. So effective methods should be taken to control the diffusion of the pollutants from the tunnel portal.
出处
《上海理工大学学报》
EI
CAS
北大核心
2005年第4期315-318,322,共5页
Journal of University of Shanghai For Science and Technology
关键词
隧道峒口
废气扩散
浓度场
数值模拟
tunnel portal
exhaust gas diffusion
concentration field
numerical simulation
