The Influencing Factors Discussions on the Subway Tunnel and Station Units Thermal Environment

Through the reduced scale model experiment and SES numerical simulation, the influencing characteristics of some factors are studied, such as the train speed, the vehicle length, the blocking ratio between the train and the tunnel, the tunnel surface friction coefficient and the train surface friction coefficient. With the single factor test, the research objects aim at the velocity and temperature fields of the tunnel and the station units including the platform, station hall, stairs and entrances. The air volumes show upward trends in the tunnel and most of the station units with the blocking ratio, train speed and vehicle length increasing. The temperatures of the platform, tunnel and stairs decline slightly with enlarging train length. The friction coefficients of the train and the tunnel surface have little effect on the thermal environment of the tunnel and station units.