X.B. Shen

TL;DR: In this paper, a set of model scale experiments were carried out, to investigate the influence of different transverse fire locations on maximum smoke temperature under the tunnel ceiling, and the results showed that the restriction effect of the sidewalls of tunnels cause the maximum smoke temperatures under the ceiling to increase compared with the unconfined space, even fires occurs at the longitudinal centerline.

TL;DR: In this article, the maximum smoke temperature under the ceiling complies with the Alpert equation in which fire keeps distant from the walls in subway stations whereas fire adjacent to the end wall leads to the maximum air pollution decaying exponentially against the increased distance between the fire and the wall.

TL;DR: In this paper, a set of model scale experiments were carried out, to investigate the influence of different transverse fire locations on maximum smoke temperature under the tunnel ceiling, and the results showed that the restriction effect of the sidewalls of tunnels cause the maximum smoke temperatures under the ceiling to increase compared with the unconfined space, even fires occurs at the longitudinal centerline.

TL;DR: In this paper, the effect of vertical shaft height on natural ventilation in urban road tunnel fires was investigated, and two special phenomena, plug-holing and turbulent boundary-layer separation were observed, both of which will influence the impact of smoke exhaust.

TL;DR: In this article, the authors quantificationally analyzed the effect of plug-holing on the smoke exhaust efficiency in road tunnel fires and found that about 2/3 of the smoke exhausting rate of the shaft is air.

TL;DR: In this article, the authors studied the smoke behaviors induced by fires in inclined tunnels with different slopes and the upstream maximum temperatures along the tunnel centerline were specifically focused, showing that the longitudinal centerline peak temperature occurs at the downstream region of fire source rather than right above the fire source.

TL;DR: In this article, the effect of strong environmental wind on a tunnel fire under natural ventilation was investigated using large eddy simulation method in order to investigate the smoke movement under the stack effect induced inside a shaft.