Numerical studies on performance evaluation of tunnel ventilation safety systems

Jojo S.M. Li, Wan Ki Chow

Research output: Journal article publicationJournal articleAcademic researchpeer-review

156 Citations (Scopus)


The performance of tunnel safety systems for fire protection and ventilation provision is evaluated using Computational Fluid Dynamics (CFD). Ventilation safety systems commonly used in tunnels are reviewed first. The safety aspects related to tunnel fire and ventilation are then discussed. Air flow induced by an accidental vehicular fire in a tunnel is simulated using CFD. Based on the results, performances of different safety systems are evaluated and compared. Systems considered are longitudinal, semi-transverse, transverse, partial transverse, and combined longitudinal and semi-transverse ventilation systems. Furthermore, sensitivity analyses on the effects of the grid size, and number of iterations on the required computing time and accuracy of the results are carried out.
Original languageEnglish
Pages (from-to)435-452
Number of pages18
JournalTunnelling and Underground Space Technology
Issue number5
Publication statusPublished - 1 Jan 2003


  • Fire
  • Iterations
  • Smoke control
  • Tunnel
  • Ventilation

ASJC Scopus subject areas

  • Building and Construction
  • Geotechnical Engineering and Engineering Geology


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