防灾减灾工程学报2011，Vol.31Issue(1)：96-101,6.
半横向通风方式隧道内污染物分布的数值仿真
Numerical Simulation and Engineering Applications of Pollutant Distribution inside the Tunnel with Semi-transverse Ventilation System
摘要
Abstract
Considering the semi-transverse exhaust ventilation of a certain city tunnel, the ventilation hole was made in the upper left wall in the tunnel. We established an 1∶ 1 three-dimensional simulation model by using the computational fluid dynamics numerical simulation method and simulated wind speed, air pressure and the concentration of pollutants in the tunnel in different conditions and made different shapes of ventilation holes, and then carried out the comparative analysis, and drew some conclusions: in the tunnel cross section with ventilation hole, a "exhaust section" is formed, for which high negative pressure and large pressure gradient are in left region and small negative pressure is in right region; With the increasing height of ventilation hole, the distribution of negative pressure expends to the right of the exhaust section and the wind speed increaes in the right region and is helpful to the dilution of pollutants in the right region, but the vertical wind speed reduces and the direction of flow is disordered in lower left region that makes the concentration of pollutants greater in left region.关键词
隧道通风/半横向/污染物浓度分布/排风孔开口高度/数值仿真Key words
tunnel ventilation/ semi-transverse/ pollutant concentration/ ventilation hole height/ numerical simulating分类
交通工程引用本文复制引用
任锐,谢永利,楼慧元..半横向通风方式隧道内污染物分布的数值仿真[J].防灾减灾工程学报,2011,31(1):96-101,6.基金项目
交通部西部交通建设科技项目(20073180038)资助 （20073180038）
