Abstract
The operation of the natural ventilation system and the operation of the mechanical ventilation system with axial fans during the fire development were compared in the study. The study was founded on the numerical fluid mechanics. Two models were built corresponding to the two systems being tested. The use of the CFD program (Computational Fluid Dynamics) allowed for the comparison of the values of important parameters at any points of both tunnels. The temperature, the velocity of the air and hot gases and the soot concentration were examined. The results have shown that the operation of mechanical ventilation with the axial fans cleans the access road to the source of the fire from one of the portals. In the case of the natural ventilation the same, however worse evacuation conditions are maintained throughout the whole tunnel. But it should be remembered, that this type of ventilation system is very sensitive to the effects of ambient air parameters such as the temperature and the wind direction and speed.
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Król, A., Król, M. (2017). The Choice of the Fire Ventilation System for a Short Road Tunnel. In: Macioszek, E., Sierpiński, G. (eds) Contemporary Challenges of Transport Systems and Traffic Engineering . Lecture Notes in Networks and Systems, vol 2. Springer, Cham. https://doi.org/10.1007/978-3-319-43985-3_13
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DOI: https://doi.org/10.1007/978-3-319-43985-3_13
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