Simple model for stratified smoke front propagation

A simple model for calculating the speed of the smoke front in the case of a tunnel fire is derived. It models the smoke layer as a gravity current, taking into account the particular dynamics of stratified flows as opposed to one-dimensional 'pipe' flows. The case of a fire with no ambient wind is studied first. The influence of the longitudinal airflow is then included, and two different closures of the model are proposed. The results compare favourably to full- and small-scale experimental data. The theoretical differences between such a model and the widely used one-dimensional models are highlighted, exhibiting major weaknesses of the latter in smoke front speed prediction. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/1463242X
• Authors:
  • MOS, A
  • CARLOTTI, P
  • GAY, B
• Publication Date: 2005

Language

• English

Media Info

• Pagination: 6-12
• Serial:
  • TUNNEL MANAGEMENT INTERNATIONAL
  • Volume: 8
  • Issue Number: 1
  • Publisher: ITC LTD
  • ISSN: 1463-242X

Subject/Index Terms

• TRT Terms: Behavior; Fire; Flow; Fluid dynamics; Mathematical models; Tunnels; Ventilation systems; Wind
• ITRD Terms: 9001: Behaviour; 1624: Fire; 5430: Flow (fluid); 6473: Mathematical model; 3374: Tunnel; 3392: Ventilation; 2554: Wind
• Subject Areas: Bridges and other structures; Construction; I54: Construction of Tunnels;

Filing Info

• Accession Number: 01011918
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Dec 20 2005 11:31AM