摘要
研究目的:为了探讨城市双洞隧道污染物扩散情况,分析车辆出口隧道对车辆进口隧道污染物扩散的影响,采用CFD技术和气体扩散方程,对某城市双洞口隧道CO扩散进行模拟分析,讨论隧道洞口间隔墙设置的必要性。研究结论:模拟结果表明洞口间不设置隔墙时,出口隧道设计阀值200 ppm的排放条件下,入口隧道局部CO浓度可以达到60 ppm,而设置隔墙的情况下,入口隧道最大CO浓度在20 ppm,可见有必要设置隔墙,以对入口隧道设计环境进行改善。
Research purposes： For discussing the pollutant diffusion of urban double-portal tunnel,the influence of the outlet of the tunnel on the pollutant diffusion at the inlet of tunnel is analyzed.Using CFD and gas diffusion equation,the simulation analysis is made for the CO diffusion of one urban double-portal tunnel,and the discussion is made on the necessity of building the partition wall in the middle of outlet and inlet of double-portal tunnel.Research conclusions：The simulation result shows under conditions there is no partition wall and the design threshold value of the outlet of the tunnel is 200 ppm,some CO concentrations of the inlet of the tunnel can reach at 60 ppm,and the maximal CO concentration of inlet of the tunnel is 20 ppm when there is a partition wall.It can be seem from abve it is very necessary to build a partition wall in the middle of outlet and inlet of double-portal tunnel,which can improve the environment of the inlet of the tunnel.
出处
《铁道工程学报》
EI
北大核心
2010年第12期69-72,共4页
Journal of Railway Engineering Society
关键词
隧道
污染物
CFD
扩散
隔墙
tunnel
pollutants
CFD
diffusion
partition wall
