通过模型试验与数值模拟对隧道火灾烟气控制策略的研究

为满足隧道火灾安全体系研究方面的需要,本文以中国科学技术大学火灾科学国家重点实验室的隧道试验台为对象,进行了比例模型隧道火灾试验,并利用Fire Dynamics Simulator(FDS)软件对该实验在不同纵向风速控制条件下的火灾烟气层沉降速度进行了计算机模拟,通过试验与模拟结果的对比,给出了不同纵向通风速度下,隧道火灾时烟气层沉降速度的变化规律,并提出了烟气分层化临界风速这一概念,为隧道火灾的控制、救援和人员疏散提供了一定的参考价值.

A Study on Tunnel Smoke Control Strategies by Experiment and Numerical Simulation

In order to meet the need of the study on the tunnel fire safety system,taking the tunnel laboratory bench in the key laboratory of the university of science and technology of China as the object,this paper does a scale model experiment on the tunnel fire,and uses the Fire Dynamics Simulator(FDS)software to simulate the fire smoke layer velocity under different vertical ventilation controlling conditions.By comparing the experimental and simulation results,this paper not only gives the variation law of the tunnel fire smoke layer velocity under the different vertical ventilation speeds,but also proposes the concept of the smoke stratification critical wind speed,which will provide some references for the road tunnel fire control,rescue and evacuation.