The model-scale tunnel is used in this investigation to analyze the maximum smoke temperature rise of interconnected for various longitudinal ventilation velocities, blockage ratios, and heat release rates where fire at confluence underground tunnel. results showed that velocities both ramp upstream source adjacent influenced under tunnel, ramps jointly affected rise. change depends on who more...

• Door opening scenarios for a metro train fire were studied. A theoretical model the inner carriage smoke propagation was developed. Experiments conducted control of fire. Critical velocities and confinement two door proposed. The critical velocity, velocity back-layering length are significant factors in tunnel This research aims to analysis correlation these 3 key parameters different during...

This paper presents a field experimental study of several participants’ evacuation behaviour in fire-induced smoke bidirectional six-lane, urban tunnel with natural ventilation. Ceiling openings vertical shafts are equipped as ventilation and provide large amount sunlight into the daytime, increasing illuminance assisting fire emergency. In this study, route choice, movement time, physical cond...

The results of numerical modeling in longitudinal ventilated sloping road tunnels are given. slope the varies range 0-6%. geometry tunnel is as follows: length: 100 m; width: 8 height: 6 area seat fire: 16 m2. fire sized: 2.75x5.8x1.5 m central part tunnel. scenarios development 5, 10, 20, 30, 50 MW fires studied case positive and negative directional ventilation flows. time modelling was 120 s...

Abstract When the above-ground space is insufficient to meet traffic demand of people, advantages underground rail transit are particularly prominent. It has short distance, unobstructed and so on, it imperative develop transit. subway train running, will push air forward. Due restriction tunnel’s inner wall on air, a large number piston winds formed. Piston wind harmful running tunnel fire, bu...