基于FDS的公路隧道火灾可逆射流风机通风疏散研究

随着我国公路隧道从高速建设期转变为建设与管理并重期，可逆射流风机在隧道通风系统中得到广泛应用。为探究可逆射流风机在隧道火灾下通风运行方式对人员疏散的影响，依托广东山隧道，采用5，20 MW两种火源功率，研究不同射流风机运行方式下隧道中部区域烟气、温度、CO体积分数及能见度的变化特性。结果表明，自然风和射流风机的出口气流均会破坏烟气-空气分层结构。在隧道内部1 m/s纵向自然风的影响下，面对不同功率火源，射流风机运行模式与人员疏散方向应随之改变。

Study on ventilation and evacuation of highway tunnel fire reversible jet fan based on FDS

With the transformation of highway tunnels from the high-speed construction period to the construction and management period in China, reversible jet fans are widely used in tunnel ventilation systems. In order to explore the influence of the reversible jet fan ventilation operation mode on personnel evacuation in tunnel fire, based on the Guangdong Mountain Tunnel,this paper studies the characteristics of smoke, temperature, CO volume fraction and visibility under different jet fan operation modes with heat release rate of 5 MW and 20 MW in the central area of the tunnel. The results show that the stratified structure of flue gas and air is destroyed by natural wind and jet fan. Under the influence of 1 m/s longitudinal natural wind inside the tunnel, the operation mode of jet fan and evacuation direction of personnel should be changed in the face of different power fire sources.