机械排烟对隧道火灾烟气控制效果的模拟研究

Simulation Research of Mechanical Extraction Effect on Tunnel Fire Smoke Control

指出了隧道发生火灾时,影响烟气控制效果的因素很多,如排烟量、排烟口的数量、火源与排烟口的距离等。探讨了在采用ANSYS-CFX软件模拟多种热释放率(HRR)情况下,排烟口位置对火源烟气控制的影响规律。模拟结果表明:临界排烟量随着HRR增加、排烟口中心与火源中心间的距离增大而增大。

Many factors influence the ,smoke--controlling effect as the fire occurs in traffic tunnel, such as the exhausted smoke volume, the number of smoke vents and the distance between fire sources and smoke vent-setc.. This article studies theeffect rules of smoke vent locations on fire smoke control by using ANSYS-CFX to simulate some heat release rate （HRR）. The results show that the critical smoke extraction volume increases asHRRrises and the distances between smoke vents and the fire source increase.