Train-induced unsteady airflow (TIUA) has a considerable effect on the ventilation and thermal environment of a subway system. Because of the complexity of a subway ventilation network and the variability of train activity, analytical and numerical methods are limited in reflecting the actual situation. In this study, a field test on the TIUA and air temperature in a subway station with full-height platform bailout doors (PBDs) was conducted under four operational conditions. The results showed that the train running parameters and operational modes, including the piston vent shafts, bypass ducts and cotton curtains at the entrances, had substantial effects on the TIUA and thermal environment. The air inflow and outflow rates through the entrances increased by 20.99% and 39.66%, respectively, as the train interval decreased by 104 s (case 2). Moreover, there was a greater difference in the air inflow rate through the entrances under different operational modes. Furthermore, uninstalling the cotton curtains increased the air inflow and outflow rates by 2.09- and 1.36-fold, respectively, at a train interval of 510 s (when comparing case 1 and case 2). In addition, removing the cotton curtains, the maximum decreases in air temperature in the entrances, hall, and platform were approximately 5.10 °C, 4.85 °C, and 1.39 °C, respectively, and the thermal environment with the single open system and closed bypass ducts condition might be better than that with the internal circulation system and open bypass ducts condition. This study provides first-hand data for ascertaining the characteristics of the TIUA and optimizing subway operational modes.

火车引起的不稳定气流（TIUA）对地铁系统的通风和热环境有很大影响。由于地铁通风网络的复杂性和火车活动的可变性，分析和数值方法在反映实际情况方面受到限制。在这项研究中，在四个运行条件下，对具有全高平台救援门（PBD）的地铁站中的TIUA和空气温度进行了现场测试。结果表明，列车的运行参数和运行模式（包括入口处的活塞通风孔轴，旁路管道和棉帘）对TIUA和热环境均具有重大影响。随着列车间隔缩短104 s，通过入口的空气流入和流出速率分别增加了20.99％和39.66％（案例2）。此外，在不同的运行模式下，通过入口的空气流入量差异更大。此外，卸载棉帘在510 s的火车间隔下（分别比较案例1和案例2）分别使空气流入和流出速率增加了2.09倍和1.36倍。此外，卸下棉帘后，入口，大厅和平台的最高气温分别降低了约5.10°C，4.85°C和1.39°C，并且采用了单开和封闭的热环境旁路管道条件可能会比内部循环系统和开放式旁路管道条件更好。该研究为确定TIUA的特征和优化地铁运营模式提供了第一手数据。在不同的运行模式下，通过入口的空气流入量差异更大。此外，卸载棉帘在510 s的火车间隔下（分别比较案例1和案例2）分别使空气流入和流出速率增加了2.09倍和1.36倍。此外，卸下棉帘后，入口，大厅和平台的最高气温分别降低了约5.10°C，4.85°C和1.39°C，并且采用了单开和封闭的热环境旁路管道条件可能会比内部循环系统和开放式旁路管道条件更好。该研究为确定TIUA的特征和优化地铁运营模式提供了第一手数据。在不同的运行模式下，通过入口的空气流入量差异更大。此外，卸载棉帘在510 s的火车间隔时（分别比较案例1和案例2），分别使空气流入和流出速率增加了2.09倍和1.36倍。此外，卸下棉帘后，入口，大厅和平台的最高气温分别降低了约5.10°C，4.85°C和1.39°C，并且采用单开系统和封闭系统的热环境旁路管道条件可能会比内部循环系统和开放式旁路管道条件更好。该研究为确定TIUA的特征和优化地铁运营模式提供了第一手数据。