Study On The Numerical Simulation And Safety Evacuation In Long Highway Tunnel Fire

The fire is one of the larger disaster and inevitable during the operation of highway tunnel. In the passed more than 20 years, a lot of scholars at home and abroad have done researches on smoke spreading principle, temperature field, and smoke field. While there is relatively few researches on the escaping pedestrian . The ability to exit under limited escape circumstances is concerned with age, Physical condition, Psychological quality and the cumulative level of temperature and smoke damage to Personal. And to comprehensively and accurately study the escape conditions is a very difficult and complicated matter. Current studies of the escaping pedestrian, Some are only the concrete temperature or the CO density, or is the visibility absolute value, some, although has considered the temperature and the time influence, but has not considered the smog density the influence.Secondly, uses the finite element numerical simulation method, has studied the different tunnel environment wind speed, the different fire scale, the different fire hazard position as well as the jet flow air blower, the horizontal channel, the slanting shaft open when the pressure distribution, the flow field distribution as well as the haze density field distribution in detail, has obtained when the fire in tunnel zones of different haze density dissemination distributed rule.Finally, in the numerical simulation research's foundation, revision FED which proposed by this article loses ability mold behavior distinction condition, has obtained when the different tunnel environment and the fire scale, after tunnel longitudinal wind speed and in fire upstream safe rescue relations, tunnel different position personnel's biggest security escaping time, 1min after the fire, the downstream personal security escapes the position and has the region which the possibility escapes.This article findings to formulate grow up time the long highway tunnel fire's personnel to escape the rescue plan, has provided the important technical support.