Fire simulation and smoke spread analysis of subway stations at different fire locations

摘要

In order to explore the law of smoke spread in the fire environment of an island-style subway station, this article takes an island-style subway as the research object. Based on the fire dynamics, pyrosim is used to establish a subway fire model to observe the smoke concentration and temperature changes under different fire locations. The study found that when the fire source is at the end of the platform layer, the flue gas concentration of the farthest evacuation channel and safety exit reaches 80% at 85s and 130s, respectively, and the flue gas temperature at the nearest exit and the farthest exit are at 32° and 28° respectively. When the fire source is in the middle of the platform layer, the smoke concentration of the evacuation channel and the safety exit reaches 80% at 70s and 105s respectively, and the temperature of the smoke at the exit exceeds 40°.