Fire Size and Fire Spread in Tunnels with Longitudinal Ventilation Systems

Author:

Carvel R. O.1,Beard A. N.,Jowitt P. W.1,Drysdale D. D.2

Affiliation:

1. School of the Built Environment, William Arrol Building, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK

2. Institute for Infrastructure and Environment, Faraday Building, University of Edinburgh, Edinburgh EH9 3JL, Scotland, UK

Abstract

The results and findings of three previous research projects are combined with new research to estimate the overall influence of longitudinal ventilation on fire size and spread in tunnels. Each of the three previous projects is briefly described. Combining the results of these three projects, together with the knowledge of HGV fire behavior in an experimental test, enables the estimation of the maximum fire size of a fire in a tunnel and the conditions under which it might spread to an adjacent vehicle, for a given longitudinal ventilation velocity. These results have been combined into a single computer model. The results are presented and discussed. It is concluded that, although it may greatly increase the heat release rate of a fire in a tunnel, increasing the ventilation velocity will tend to reduce the likelihood of the fire spreading to an adjacent vehicle, assuming no flame impingement.

Publisher

SAGE Publications

Subject

Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality

Reference30 articles.

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