In this
paper, the concentration distribution of CO emitted by motor vehicles in
Beijing Yuntong Tunnel is simulated and analyzed based on Fluent numerical
simulation software.Firstly,
the physical model of tunnel geometry is established. Secondly, the suitable
control equations and boundary conditions are selected to describe the
diffusion distribution of pollutants in the tunnel. At the same time, the reliability of the model is verified according to
the measured data, and the distribution law of CO concentration in the
tunnel is observed through the simulation results. The tunnel is unorganized at
the entrance of the tunnel. In the simulation results, the CO concentration at
the entrance of the tunnel is far more than the CO unorganized emission limit
in Beijing. The CO emission of the tunnel should be purified to prevent
pollution of the urban environment.
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