公路隧道火灾烟气流动的数值模拟

Numerical Simulation of Smoke Flow During Highway Tunnel Fire

为满足公路隧道火灾安全体系研究方面的需要,以成都天府隧道为对象,建立了隧道火灾烟气流动的数学模型和物理模型.采用CFD方法,利用Phoenics 3.6.1软件对该工程实例在纵向通风控制条件下的火灾烟流进行了数值模拟,给出了不同纵向通风速度下火灾烟气的浓度场、温度场等的分布规律,讨论了烟气的发展情况,得到了不同区段火和烟气对人构成威胁的情况,并对隧道火灾的控制、救援和人员疏散提出了一些建议.

In order to effectively investigate the fire safety system for highway tunnels, this paper proposes a mathematical model and a physical model to describe the smoke flow in the tunnel, with the Tianfu Highroad Tunnel in Chengdu as the research object. On the basis of the proposed models and by using the CFD software Phoenics 3.6. 1, the fire smoke flow in longitudinal ventilation condition is numerically simulated. By means of simulation, the distribution laws of the concentration field and the temperature field of thermal smoke in different longitudinal ventilation conditions are obtained, the development of the smoke is analyzed, and the nasty instances caused by the fire and smoke in various tunnel sections to passengers are obtained. Some references for the fire controlling, passenger rescue and evacuation are finally provided.