An experimental study on the effects of blockage ratio and ventilation velocity on the heat release rate of tunnel fires


JOURNAL OF FIRE SCIENCES, vol.29, no.6, pp.555-575, 2011 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 29 Issue: 6
  • Publication Date: 2011
  • Doi Number: 10.1177/0734904111416336
  • Title of Journal : JOURNAL OF FIRE SCIENCES
  • Page Numbers: pp.555-575
  • Keywords: tunnel fire, froude number, blockage ratio, heat release rate, emergency ventilation


It is very important to accurately predict the fire-induced air velocity, temperature, and smoke concentrations in tunnel fires to design efficient fire protection systems. In this study a scaled model of a tunnel was constructed based on Froude number scaling and wood sticks with different configurations which were burned in a controlled environment. Model vehicles having a square base were built according to the wood crib theory. The impact of varying longitudinal ventilation velocity and the cross-sectional area of the burning substances on the heat release rate and temperature distribution in the tunnel were measured.