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- W2285517619 abstract "In this paper, the influence of slope on the spreading characteristics of fire smoke in the semitransverse ventilated tunnels was studied by using the FDS simulation. Through simulation experiments, the reasonable smoke exhaust strategies for preventing fire smoke from spreading in the sloping tunnel were obtained. Simulation results showed that: under 30MW fire power, the two-way balanced smoke exhaust strategy had good effect for the semi-transverse ventilated horizontal tunnel. However, in the sloping tunnel, due to the high stack effect, more smoke flowed to the upgrade direction. When the slope angle was greater than 1.5%, the smoke in the downgrade direction was controlled within the smoke vent opening range due to the effect of fire wind pressure. At this time, in order to effectively exhaust the smoke and reduce the energy consumption of the smoke exhaust fan, the unilateral smoke exhaust strategy in the upgrade direction was adopted. When the tunnel slope was less than 2%, appropriately increasing the smoke exhaust amount could strengthen the smoke exhaust effect and prevent the smoke from spreading to the exit of the tunnel. When the slope was greater than 3%, due to the high stack effect, the smoke in the tunnel spread rapidly to the exit. Then adding the vertical ventilation in the upgrade direction and preventing the smoke from returning could better limit the smoke spreading scope. Keywords-Slope: Smoke Exhaust Strategy; Tunnel Fire; Smoke Spread; Semi-transerse Ventilation" @default.
- W2285517619 created "2016-06-24" @default.
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- W2285517619 date "2015-01-01" @default.
- W2285517619 modified "2023-09-23" @default.
- W2285517619 title "Research on the Semi-transverse Ventilation and Smoke Exhaust Strategy in Sloping Tunnels" @default.
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- W2285517619 doi "https://doi.org/10.2991/lemcs-15.2015.198" @default.
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