Train-induced unsteady airflow (TIUA) characteristics of track area in subway station with platform screen doors (PSDs)

Train-induced unsteady airflow (TIUA) has a great effect on the ventilation and thermal environment of subway line. Track area, connecting tunnel with station, is source TIUA acting station. Exploring characteristics track area contributes to utilizing for improving station environment. In this study, 1D numerical model according an actual line was established by IDA Tunnel software, analyse rates through inbound outbound ends in PSDs Four key factors, namely, train arrival time interval between both tunnels, interval, operation modes piston vent shafts bypass ducts, were analysed. The results demonstrate that (bypass ducts closed) are mainly affected driving tunnel. decreases about 36%∼41%, as increases from 180 s 540 s. By adjusting shafts, change can reach up 13%∼27%. opening 42%∼50%.