Numerical study of smoke propagation in a simulated fire in a wagon within a subway tunnel

Felipe Vittori, Luis Rojas-Solórzano, Armando J. Blanco, Rafael Urbina

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This work deals with the numerical (CFD) analysis of the smoke propagation during fires within closed environments. It is evaluated the capacity of the emergency ventilation system in controlling the smoke propagation and minimizing the deadly impact of an eventual fire in a wagon within the Metro de Caracas subway tunnel on the passengers safety. For the study, it was chosen the tunnel section between Teatros and Nuevo Circo subway stations, which consists of two parallel independent twin tunnels, connected through a transverse passage. The tunnels are provided by a longitudinal ventilation system, integrated by a set of reversible fans located at both ends of the tunnels. Three stages were considered in the study: (a) Model set up; (b) Mesh sensitivity analysis; (c) Validation of the physical-numerical parameters to be used in the numerical model; and (d) Simulation of fire scenarios in Metro de Caracas subway stations. Stages (b)-(c), aimed to testing and calibrating the CFD tool (ANSYS-CFX10™), focused on reproducing experimental data from Vauquelin and Mégret [1], who studied the smoke propagation in a fire within a 1:20 scale road tunnel. Stage (d) critical scenarios were established via a preliminary discussion with safety experts from Metro de Caracas, in order to reduce the computer memory and the number of simulations to be performed. The analyses assessed the reliability of escape routes and alternative paths for the evacuation of passengers. Additionally, the smoke front movement was particularly computed, as a function of time, in order to determine the possible presence of the "backlayering" phenomenon [5]. Results demonstrate the strengths and weaknesses of the current ventilation system in the event of a fire in the subway tunnel, and suggest new strategies to address this potentially lethal event to minimize the risks for passengers.

Original languageEnglish
Title of host publication2008 Proceedings of the ASME Fluids Engineering Division Summer Conference, FEDSM 2008
Pages1017-1024
Number of pages8
Volume1
EditionPART B
DOIs
Publication statusPublished - 2009
Externally publishedYes
Event2008 ASME Fluids Engineering Division Summer Conference, FEDSM 2008 - Jacksonville, FL, United States
Duration: Aug 10 2008Aug 14 2008

Other

Other2008 ASME Fluids Engineering Division Summer Conference, FEDSM 2008
CountryUnited States
CityJacksonville, FL
Period8/10/088/14/08

Fingerprint

Subways
Smoke
Tunnels
Fires
Subway stations
Ventilation
Computational fluid dynamics
Fans
Sensitivity analysis
Numerical models
Data storage equipment
Testing

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Mechanical Engineering

Cite this

Vittori, F., Rojas-Solórzano, L., Blanco, A. J., & Urbina, R. (2009). Numerical study of smoke propagation in a simulated fire in a wagon within a subway tunnel. In 2008 Proceedings of the ASME Fluids Engineering Division Summer Conference, FEDSM 2008 (PART B ed., Vol. 1, pp. 1017-1024) https://doi.org/10.1115/FEDSM2008-55281

Numerical study of smoke propagation in a simulated fire in a wagon within a subway tunnel. / Vittori, Felipe; Rojas-Solórzano, Luis; Blanco, Armando J.; Urbina, Rafael.

2008 Proceedings of the ASME Fluids Engineering Division Summer Conference, FEDSM 2008. Vol. 1 PART B. ed. 2009. p. 1017-1024.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Vittori, F, Rojas-Solórzano, L, Blanco, AJ & Urbina, R 2009, Numerical study of smoke propagation in a simulated fire in a wagon within a subway tunnel. in 2008 Proceedings of the ASME Fluids Engineering Division Summer Conference, FEDSM 2008. PART B edn, vol. 1, pp. 1017-1024, 2008 ASME Fluids Engineering Division Summer Conference, FEDSM 2008, Jacksonville, FL, United States, 8/10/08. https://doi.org/10.1115/FEDSM2008-55281
Vittori F, Rojas-Solórzano L, Blanco AJ, Urbina R. Numerical study of smoke propagation in a simulated fire in a wagon within a subway tunnel. In 2008 Proceedings of the ASME Fluids Engineering Division Summer Conference, FEDSM 2008. PART B ed. Vol. 1. 2009. p. 1017-1024 https://doi.org/10.1115/FEDSM2008-55281
Vittori, Felipe ; Rojas-Solórzano, Luis ; Blanco, Armando J. ; Urbina, Rafael. / Numerical study of smoke propagation in a simulated fire in a wagon within a subway tunnel. 2008 Proceedings of the ASME Fluids Engineering Division Summer Conference, FEDSM 2008. Vol. 1 PART B. ed. 2009. pp. 1017-1024
@inproceedings{2e15403dfdc74db7982c7aac427ff2e8,
title = "Numerical study of smoke propagation in a simulated fire in a wagon within a subway tunnel",
abstract = "This work deals with the numerical (CFD) analysis of the smoke propagation during fires within closed environments. It is evaluated the capacity of the emergency ventilation system in controlling the smoke propagation and minimizing the deadly impact of an eventual fire in a wagon within the Metro de Caracas subway tunnel on the passengers safety. For the study, it was chosen the tunnel section between Teatros and Nuevo Circo subway stations, which consists of two parallel independent twin tunnels, connected through a transverse passage. The tunnels are provided by a longitudinal ventilation system, integrated by a set of reversible fans located at both ends of the tunnels. Three stages were considered in the study: (a) Model set up; (b) Mesh sensitivity analysis; (c) Validation of the physical-numerical parameters to be used in the numerical model; and (d) Simulation of fire scenarios in Metro de Caracas subway stations. Stages (b)-(c), aimed to testing and calibrating the CFD tool (ANSYS-CFX10™), focused on reproducing experimental data from Vauquelin and M{\'e}gret [1], who studied the smoke propagation in a fire within a 1:20 scale road tunnel. Stage (d) critical scenarios were established via a preliminary discussion with safety experts from Metro de Caracas, in order to reduce the computer memory and the number of simulations to be performed. The analyses assessed the reliability of escape routes and alternative paths for the evacuation of passengers. Additionally, the smoke front movement was particularly computed, as a function of time, in order to determine the possible presence of the {"}backlayering{"} phenomenon [5]. Results demonstrate the strengths and weaknesses of the current ventilation system in the event of a fire in the subway tunnel, and suggest new strategies to address this potentially lethal event to minimize the risks for passengers.",
author = "Felipe Vittori and Luis Rojas-Sol{\'o}rzano and Blanco, {Armando J.} and Rafael Urbina",
year = "2009",
doi = "10.1115/FEDSM2008-55281",
language = "English",
isbn = "9780791848418",
volume = "1",
pages = "1017--1024",
booktitle = "2008 Proceedings of the ASME Fluids Engineering Division Summer Conference, FEDSM 2008",
edition = "PART B",

}

TY - GEN

T1 - Numerical study of smoke propagation in a simulated fire in a wagon within a subway tunnel

AU - Vittori, Felipe

AU - Rojas-Solórzano, Luis

AU - Blanco, Armando J.

AU - Urbina, Rafael

PY - 2009

Y1 - 2009

N2 - This work deals with the numerical (CFD) analysis of the smoke propagation during fires within closed environments. It is evaluated the capacity of the emergency ventilation system in controlling the smoke propagation and minimizing the deadly impact of an eventual fire in a wagon within the Metro de Caracas subway tunnel on the passengers safety. For the study, it was chosen the tunnel section between Teatros and Nuevo Circo subway stations, which consists of two parallel independent twin tunnels, connected through a transverse passage. The tunnels are provided by a longitudinal ventilation system, integrated by a set of reversible fans located at both ends of the tunnels. Three stages were considered in the study: (a) Model set up; (b) Mesh sensitivity analysis; (c) Validation of the physical-numerical parameters to be used in the numerical model; and (d) Simulation of fire scenarios in Metro de Caracas subway stations. Stages (b)-(c), aimed to testing and calibrating the CFD tool (ANSYS-CFX10™), focused on reproducing experimental data from Vauquelin and Mégret [1], who studied the smoke propagation in a fire within a 1:20 scale road tunnel. Stage (d) critical scenarios were established via a preliminary discussion with safety experts from Metro de Caracas, in order to reduce the computer memory and the number of simulations to be performed. The analyses assessed the reliability of escape routes and alternative paths for the evacuation of passengers. Additionally, the smoke front movement was particularly computed, as a function of time, in order to determine the possible presence of the "backlayering" phenomenon [5]. Results demonstrate the strengths and weaknesses of the current ventilation system in the event of a fire in the subway tunnel, and suggest new strategies to address this potentially lethal event to minimize the risks for passengers.

AB - This work deals with the numerical (CFD) analysis of the smoke propagation during fires within closed environments. It is evaluated the capacity of the emergency ventilation system in controlling the smoke propagation and minimizing the deadly impact of an eventual fire in a wagon within the Metro de Caracas subway tunnel on the passengers safety. For the study, it was chosen the tunnel section between Teatros and Nuevo Circo subway stations, which consists of two parallel independent twin tunnels, connected through a transverse passage. The tunnels are provided by a longitudinal ventilation system, integrated by a set of reversible fans located at both ends of the tunnels. Three stages were considered in the study: (a) Model set up; (b) Mesh sensitivity analysis; (c) Validation of the physical-numerical parameters to be used in the numerical model; and (d) Simulation of fire scenarios in Metro de Caracas subway stations. Stages (b)-(c), aimed to testing and calibrating the CFD tool (ANSYS-CFX10™), focused on reproducing experimental data from Vauquelin and Mégret [1], who studied the smoke propagation in a fire within a 1:20 scale road tunnel. Stage (d) critical scenarios were established via a preliminary discussion with safety experts from Metro de Caracas, in order to reduce the computer memory and the number of simulations to be performed. The analyses assessed the reliability of escape routes and alternative paths for the evacuation of passengers. Additionally, the smoke front movement was particularly computed, as a function of time, in order to determine the possible presence of the "backlayering" phenomenon [5]. Results demonstrate the strengths and weaknesses of the current ventilation system in the event of a fire in the subway tunnel, and suggest new strategies to address this potentially lethal event to minimize the risks for passengers.

UR - http://www.scopus.com/inward/record.url?scp=70349088235&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=70349088235&partnerID=8YFLogxK

U2 - 10.1115/FEDSM2008-55281

DO - 10.1115/FEDSM2008-55281

M3 - Conference contribution

SN - 9780791848418

VL - 1

SP - 1017

EP - 1024

BT - 2008 Proceedings of the ASME Fluids Engineering Division Summer Conference, FEDSM 2008

ER -