汽车隧道内气流及污染问题研究

研究了汽车隧道内的空气流动及污染扩散问题。对隧道内各种通风竖井进行简化,建立相应的隧道内空气总的运动方程。在采用龙格-库塔法求出流动情况的基础上,求解污染扩散方程,计算隧道内的污染纵向分布,从而建立了一套隧道内的流动及污染分布的工程估算方法。计算结果表明该方法的有效性,得出了使用不当的通风竖井方案反而会抑制隧道内污染物扩散的结论。

Ventilation and pollution characteristics of vehicle tunnel

Methods on air pollution and ventilation of vehicle tunnels are studied in this paper.On the basis of the simplified ventilation wells, control equations for airflow in a vehicle tunnel are established, which are solved by RUNGE-KUTTA method and longitudinal pollution distributions are obtained by solving diffuse equations with difference method,then a set of engineering evaluating methods on air pollution and ventilation of vehicle tunnels are established.Validity and practicability of this method are shown by computation results and a conclusion is drawn that an improper ventilation well project will restrain the diffusion of infection.