Numerical analysis of smoke flow under the effect of longitudinal airflow in a tunnel fire

2020 ◽  
Vol 44 (8) ◽  
pp. 1033-1043
Author(s):  
Brahim Kalech ◽  
Mourad Bouterra ◽  
Afif ElCafsi
Keyword(s):  
Numerical Analysis ◽  
Smoke Flow ◽  
Tunnel Fire

Numerical Analysis on the Effect of Thermal Insulation of Closure on Fire Smoke Spread Rate in Building's Corridor

2014 ◽  
Vol 513-517 ◽  
pp. 2635-2638
Author(s):  
Xuan Wei Peng
Keyword(s):  
Numerical Analysis ◽  
Thermal Insulation ◽  
Air Temperature ◽  
Spread Rate ◽  
Smoke Flow ◽  
External Insulation ◽  
Flow Prediction ◽  
Smoke Spread ◽  
Fire Smoke ◽  
Fire Ignition

The corridor is an important way of evacuation and rescue in building fire. The fire smoke flow prediction software developed successfully was applied to simulate a building with a 28.8 meters long corridor to investigate the effect of the different thermal insulation on fire smoke spread rate. Two representative thermal insulation, external insulation and internal insulation were compared. In 3600s fire time, air temperature in the corridor of external insulation is much lower than that of internal insulation. The air temperature gap gets narrowed between the two insulation methods in the corridor with the prolongation of fire time. Temperature difference increases as the distance increase from the fire ignition place. The corridor gets unsafe of internal insulation in 7 minute since fire ignition, while about half the length of the corridor stay secure of external insulation in 10 minutes since fire ignition. That implies more available safe egress time can be gained with external insulation than internal insulation. Smoke spread rate was numerically compared based on the air temperature variation. Smoke spread rate of internal insulation is much higher than that of external insulation and the corresponding ratio is 1.732:1.

Numerical Simulation of Smoke Flow and its Effect during Railway Tunnel Fire

2010 ◽  
Vol 439-440 ◽  
pp. 1444-1449
Author(s):  
Zhi Ming Qu ◽  
Xiao Yu Ma
Keyword(s):  
Numerical Simulation ◽  
Laminar Flame ◽  
Railway Tunnel ◽  
Smoke Flow ◽  
Tunnel Fire ◽  
Turbulence Flow ◽  
Pedestrian Evacuation ◽  
Good Consistency ◽  
Great Support ◽  
Set Up

The physical and mathematical turbulence flow fields models are set up to numerically simulate railway tunnel fire and smoke flow. An experimental fire simulation results in railway tunnel indicate that the temperature distribution of laminar flame, the smoke concentration and flow velocity can be expressed by the fully developed smoke flow downwind. Through numerical simulation, it is concluded that the turbulent flow field models are better and have good consistency with the experimental results. The phenomenon of tunnel fire, the development and distribution of smoke flow can not only provide great support on the fire protecting and ventilation plan, but also give better reference to the pedestrian evacuation and the design of disaster prevention and mitigation.

Simulation of smoke flow and longitudinal ventilation in tunnel fire

2006 ◽  
Vol 16 (3) ◽  
pp. 741-746 ◽  
Author(s):  
Gao-shang YANG ◽  
Yong-lin AN ◽  
Li-min PENG ◽  
Jin-hua ZHANG
Keyword(s):  
Smoke Flow ◽  
Tunnel Fire ◽  
Longitudinal Ventilation

Numerical Simulation for Smoke Flow of the Underground Railway Tunnel Fire

2011 ◽  
Vol 368-373 ◽  
pp. 1454-1457
Author(s):  
Li Xin Li ◽  
Lan Ying Zhao
Keyword(s):  
Numerical Simulation ◽  
Flue Gas ◽  
Concentration Field ◽  
Theoretical Background ◽  
Railway Tunnel ◽  
Smoke Flow ◽  
Tunnel Fire ◽  
Field Modeling ◽  
Underground Railway ◽  
Fire Characteristics

The characteristics of tunnel fire are analyzed, and the numerical simulation of some tunnel of Shenyang railway is made with the CFD software star-ccm+ 5.02, which applies the field modeling method. A comprehensive understanding of tunnel fire characteristics and flue gas development are obtained, through analyzing the concentration field and temperature field, which may provide the theoretical background for evacuation design in tunnel fire. The effective measures of fire rescue and evacuation are also put forward.

scholarly journals Numerical Study on the Smoke Flow Characterization and Phenomenon of Plug-Holing under Lateral Smoke Exhaust in Tunnel Fire

2018 ◽  
Vol 11 (1) ◽  
pp. 115-126 ◽  
Author(s):  
J. Yang ◽  
X. Pan ◽  
Z. Wang ◽  
M. Hua ◽  
J. Jiang ◽  
...  
Keyword(s):  
Numerical Study ◽  
Smoke Flow ◽  
Tunnel Fire ◽  
Flow Characterization
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