中文摘要：

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。

英文摘要：

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-s 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.