海底隧道竖井口污染物扩散的数值分析及应用  

Numerical Analysis of Pollutant Exhaust of Immersed Tunnel and Engineering Application

作　　者：任锐[1] 谢永利[1] 

机构地区：[1]长安大学公路学院,陕西西安710064

出　　处：《郑州大学学报（工学版）》2010年第5期90-94,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：交通部西部交通建设科技项目(20073180038)

摘　　要：针对某海底隧道竖井排出污染物对人工岛上环境影响,以CO为主要污染物源,运用计算流体力学软件CFdesign建立竖井CO排放及扩散的三维数值模型,对排风竖井周围CO浓度分布进行数值模拟,结合人工岛上对CO浓度及影响范围的控制标准,分析排风塔高度、排风风量、环境自然风风速对排风塔所排污染物的浓度分布的影响.计算结果表明:风塔高度越高,人工岛上限制高度范围内的CO浓度越小,当风塔高度在35 m以上时,人工岛地面以上15 m范围内空气质量达标,并不再随风塔高度而变化;排风风量越小,污染物沿排风方向的影响范围越小.Considering the environmental impact of pollutants on the artificial islands,which are discharged from the shaft in ventilation of immersed tunnel in a project,a three-dimensional numerical simulation model of the emissions and the diffusion of CO is established,and the concentration profiles of CO in the air on artificial island by CFD method is simulated.The impacts of shaft height,exhaust air volume and wind velocity on CO concentration distribution in the air on artificial island are analysed.The results show that： concentration of CO at 15 m height position above ground of artificial island decreased with the increasing of shaft height;When the shaft height exceeds 35 m,the concentration of CO at 15 m high position above ground is lower than 10ppm;range of influence on CO decreased with the reduction of exhaust air volume.

关 键 词：隧道工程 污染物浓度分布 数值仿真 通风 正交设计 

分 类 号：U453.5[建筑科学—桥梁与隧道工程]