Curved tunnels are more likely to have an accident and a fire source due to their physical
characteristics. Using a 3D computational fluid dynamics tool with body-fitted grids, three …

Mountain tunnel is inevitably connected to those canyon areas that could result in a very
special situation for the related designs. When the airflow goes through the canyon from an …

Proper ventilation of tunnels has remained a serious issue for many years. However, only
empirical methods are currently utilised for estimating ventilation time scales in construction …

The diffusion angle of the air jet and the optimal pitch angle (OPA) of the jet fan are studied
and compared through turbulent jet theory and FLUENT numerical simulation in this paper …

Press-in ventilation technology is an important method to ensure the effective control of
pollutants concentration and production safety during the drilling and blasting construction of …

Longitudinal ventilation is widely employed in underground interconnected infrastructure,
where the characteristic of the ventilated flow is distinctly different from the “normal” tunnels …

In more and more tunnels, natural ventilation mode with vertical shafts has been gradually
employed. However, there are few studies investigating the influences of fire and shaft …

This paper presents full-scale experimental, numerical, and theoretical research on the
spatial and temporal structure of airflow for different modes of ventilation system operation in …

Constructions of underground complex road networks or tunnel complexes all over the world
are in the ascendant. However, very few countries have developed specific …

In order to analyze the feasibility of setting bypass tunnel in urban highway tunnel for
pollutant purification and dust removal, a physical model including main tunnel and bypass …