NUMERICAL INVESTIGATION ON SMOKE MANAGEMENT IN UNDERGROUND BRANCHED TUNNELS

  • Ramy M. Ragab Mechanical Power Engineering Dept, Faculty of Engineering of Shoubra,,BenhaUniversity, Egypt
  • M.F. Abd Rabbo Mechanical Power Engineering Dept, Faculty of Engineering of Shoubra,,BenhaUniversity, Egypt
  • M.A. Moawed Mechanical Power Engineering Dept, Faculty of Engineering of Shoubra,,Benha University, Egypt
Keywords: Road Tunnel, FDS, Smoke Management, Curtain, Visibility, Water Mist, Velocity

Abstract

Soot is perhaps the most harmful element in vehicle tunnels fire as smoke moves harmonize with the way passengers flee. It decreases visibility and can cause suffocation fatalities.

This paper presents an empirical analysis on the effect of removing smoke through different ventilation systems on smoke distribution inside the vehicle tunnel, such as water mist system with transverse ventilation with several extractions of exhaust fans   Sustainable human conditions were also tested. FDS 2019 ver. was used to predict temperature, visibility, and concentration of co.

Motivation/Background: Present work to investigate the effect of extracting the smoke by different system of ventilation on smoke spread inside the vehicular tunnel.

Method: By FDS 2019 that used governing equations and naver-stocks equations.

Results: We predicted in this paper smoke spread, temperature distribution, co concentration distribution and visibility.

Conclusions: This study looks at the importance of smoke control generally as well as the smoke control criteria in the automotive tunnel configuration which acknowledged them.

Because the smoke barrier water mist screen with a transverse ventilation device improves the smoke removal technique. FDS is a valuable method for simulating smoke diffusion as well as other effects.

Downloads

Download data is not yet available.

References

PIARC, "Fire and smoke control in road tunnels", World Road Association (PIARC) publication, 2007.

W.K. Chow *, K.Y. Wong, W.Y. Chung “Longitudinal ventilation for smoke control in a tilted tunnel by scale modeling” 25 (2010) 122–128. 31.

W.K. Chow *, K.Y. Wong, W.Y. Chung “Longitudinal ventilation for smoke control in a tilted tunnel by scale modeling” 25 (2010) 122–128.

W.K. Chow” Smoke movement in tilted tunnel fires with longitudinal ventilation” (2015) 14–22 DOI: https://doi.org/10.1016/j.firesaf.2015.04.001

Daan Van den Broecke” Study on the Effectiveness of Sprinklers in Tunnels” David Sugden Young Engineers Writing Award 2016.

A. A. Mostafa, “CFD investigation of smoke management in vehicular tunnels,” CU Theses, 2012.

J. Ji, H. Wan, K. Li, J. Han, and J. Sun, “A numerical study on upstream maximum temperature in inclined urban road tunnel fires,” Int. J. Heat Mass Transf., vol. 88, pp. 516–526, 2015. DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2015.05.002

K. B. McGrattan and G. P. Forney, “Fire Dynamics Simulator: User’s Manual (NISTIR 6469),” 2019.

Tiannian Zhou 2017” Influence of constraint effect of sidewall on maximum smoke temperature distribution under a tunnel ceiling” 112 (2017) 932–941. DOI: https://doi.org/10.1016/j.applthermaleng.2016.10.111

Published
2020-04-30
How to Cite
Ragab, R. M., Rabbo, M. A., & Moawed, M. (2020). NUMERICAL INVESTIGATION ON SMOKE MANAGEMENT IN UNDERGROUND BRANCHED TUNNELS. International Journal of Engineering Technologies and Management Research, 7(4), 31-38. https://doi.org/10.29121/ijetmr.v7.i4.2020.574