公路隧道内运动汽车尾气污染扩散数值仿真研究

摘要

利用计算流体力学(CFD)方法,结合标准k-ε湍流模型、Mixture混合多相流模型和动网格技术,数值仿真了公路隧道内运动汽车的尾气污染扩散,结果与实验测量值吻合较好.表明,在没有其他通风方式的公路隧道内,运动汽车排出的污染物主要分布在近地面;运动汽车后方会形成1条高速风带,对隧道内污染物纵向扩散具有关键作用.%In the paper , exhaust pollution diffusion of moving cars in highway tunnel was studied by using computational fluid dynamics ( CFD) methods combined the standard k-ε turbulence model , mixture multiphase model and the dynamic mesh technology .The results of simulation were consistent with the experimental results . It showed that exhaust pollutants of moving cars mainly distributed near the ground in the tunnel when on auxilia -ry ventilation was used .There was a high-speed wind belt behind the moving cars , which played an important role on pollutants longitudinal diffusing along the tunnel .