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Modelling Fire Size And Spread In Tunnels

Beard, A.N., Carvel, R. and Jowitt, P., 2005. Modelling Fire Size And Spread In Tunnels. Fire Safety Science 8: 1509-1517. doi:10.3801/IAFSS.FSS.8-1509


The heat release rate (HRR) of a fire in a tunnel is a crucial factor, both in terms of fire spread and smoke production. Key factors which influence the HRR are: {1} the nature of the burning item, {2} the tunnel geometry, {3} the ventilation conditions and {4} vehicle separation. This paper reports on work which has been undertaken over a number of years to model the dependence of HRR on these factors; the work is continuing. Specifically, Bayesian probabilistic models have been devised to model the dependence of the HRR of a fire on tunnel geometry and longitudinal forced ventilation and deterministic models have been devised to model fire spread from one item to another in a tunnel similar to the Channel Tunnel; again with longitudinal ventilation. Key interim results are presented.


fire, risk, tunnels, heat release rate

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