Investigation on the Effect of Platform Height on Smoke Characteristics of Fire Scenarios for Subway Stations

In this study, three full-scale experiments and a series of numerical simulations were conducted to investigate the influence subway platform height atrium ceiling stations on smoke control by mechanical exhausting systems. The temperature variation with time, maximum distribution, stratification discussed. Results showed that had capacity store smoke, especially at early stage spread. However, efficiency extraction did not increase simply rise in height, favorable exhaust velocity was crucial for elimination. optimal studied simulation it found area diffusion higher significantly smaller under velocity. addition, prediction model proposed. This study could provide on-site data spread characteristics design, operation, and, significantly, guide safety evacuation system stations.