公路隧道火灾情况下风压场变化的模型试验研究

The Model Test on Ventilation Pressure Change in Highway Tunnel Fire

公路隧道发生火灾时,对隧道安全构成威胁的是烟流和温度的扩散,而烟流和温度的扩散速度主要依赖于风流速度,影响风流速度的主要因素是风压。由于隧道火灾产生的烟流节流效应阻力、烟流摩擦阻力、烟流浮力效应的作用,使隧道内风压发生很大的变化,因此,研究风压的变化规律对救援和通风方案的制定有着极其重要的意义。

The diffusion of smoke and temperature are serious danger for tunnel safety,when tunnel fire happen.The diffusion speed of smoke and temperature depend mainly on the tunnel ventilation velocity,and tunnel ventilation pressure is the major factor affecting tunnel ventilation velocity.The tunnel ventilation pressure will change,when smoke throttle resistance,smoke viscous force,smoke buoyancy are produced by tunnel fire.Therefore,It is very important to find out the regular pattern of tunnel ventilation pressure for rescue and the strategic decision of ventilation..