When the mountain tunnel projects passing through complex formation with coal, it happened along disaster accidents such as gas outburst, combustion, and explosion. These disasters should seriously threaten safety life of construction personnel affect normal operation construction. Ventilation is most effective means to control gas, fire, dust, heat, other disasters. To study effects different ...

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...

A critical air velocity analysis was performed using a numerical model adapted for the eastern tunnel tube of Kastelec road in Slovenia. This allowed efficiency fans to be tested, which is required maintain appropriate traffic conditions and prescribed safety tunnel. At velocity, that is, at an lower than one, where spread smoke can still effectively controlled ensure time safe evacuation passe...

Preface Construction works always involve danger and their environment is not always clean. In case of tunnelling works, especially in tunnels to be constructed with the drill and blast method, the problems on the safety and health such as the ones by dust and poison gas are serious subjects. This paper discusses the principle of ventilation system in tunnel during construction to provide good ...

Regulations and customer demands put pressure on rail designers to deliver passenger coaches with comfortable climates. In the past, Siemens engineers spent about four months testing passenger coaches in a climate wind tunnel to validate the design of the heating, ventilation and cooling (HVAC) system. Now they use ANSYS Fluent computational fluid dynamics (CFD) software to validate the design ...