Experimental investigation on the effect of asymmetrical sealing on tunnel fire behavior

Chen, Changkun; Zhu, Cong-xiang; Liu, Xuanya; Yu, Nian-hao

doi:10.1016/j.ijheatmasstransfer.2015.08.079

Cited by 95 publications

(16 citation statements)

References 25 publications

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“…(7) . In addition, it was previously indicated that the relative size of S and H ef is also crucial on the burning behaviors and ceiling flame length for multiple fires in tunnel [22,23] . Hence, Eq.…”

Section: Effective Flame Lengthmentioning

confidence: 99%

“…Hansen and Ingason [22] found that the ignition time of adjacent wooden pallet decreased with increasing the longitudinal ventilation in a model tunnel. Chen et al [23] found that the two methanol fires would shift to the entrance of tunnel with lower sealing ratio when the two ends of tunnel are sealed with different ratios. However, detailed investigations on the critical condition of flame merging, the MLR, the flame height and the heat flux in tunnels were not conducted in literatures.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental study on flame merging behaviors from two pool fires along the longitudinal centerline of model tunnel with natural ventilation

Wan

Gao

et al. 2016

Combustion and Flame

104

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Section: Effective Flame Lengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental study on flame merging behaviors from two pool fires along the longitudinal centerline of model tunnel with natural ventilation

Wan

Gao

et al. 2016

Combustion and Flame

104

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“…Hansen 19 investigated the influence of longitudinal ventilation speed on the time of the adjacent fire sources ignited in the tunnel. Chen 20…”

Section: Introductionmentioning

confidence: 99%

“…Hansen 19 investigated the influence of longitudinal ventilation speed on the time of the adjacent fire sources ignited in the tunnel. Chen 20 experimentally studied the effect of asymmetrical sealing on the combustion rate and temperature distribution of the dual methanol pool fires in the tunnel. Tsai 21 studied the influence of heat release rate and fire source spacing on the critical wind speed when two fire sources were placed on the longitudinal centerline of the tunnel.…”

Section: Introductionmentioning

confidence: 99%

Study on the flame morphological characteristics of dual fire sources in tunnel under longitudinal ventilation

Zhang

Chen

et al. 2021

Fire and Materials

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Summary In this article, a small‐scale experiment (1:10) is used to study the flame morphology of the dual fire sources in the tunnel under longitudinal ventilation. The experimental results show that: (1) The flame height increases with the heat release rate of the fire source. When there is no wind, the flame height will increase as the fire source spacing increases. Under the effect of longitudinal ventilation, the flame height decreases first and then increases as the fire source spacing increases. (2) The flame inclination angle increases as the heat release rate of the fire source increases. When there is no wind, the flame inclination angle decreases with the increase of the fire source spacing. Under the effect of longitudinal ventilation, as the fire source spacing increases, the flame inclination angle decreases first and then increases, which is consistent with the variation law of the flame height with the fire source spacing. For the experimental conditions of smaller heat release rate of fire source and larger fire source spacing, the flame merged phenomenon gradually decreases.

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“…As the number and length of tunnels increase, the driving speed and density of vehicles in the tunnel also increase, so tunnel disasters have occurred more frequently in recent decades, and fire is one of the major disasters that may occur in tunnels. [6][7][8][9][10][11][12][13][14] If a fire occurs in the tunnel, due to its long-narrow structure and the poor internal ventilation capacity, the hot smoke will spread rapidly throughout the tunnel and will be difficult to be discharged. [15][16][17][18][19][20][21][22] Moreover, the toxic gases in the tunnel will seriously affect the evacuation of stranded persons and rescue work of fire department.…”

Section: Introductionmentioning

confidence: 99%

Effects of fire location on the capacity of smoke exhaust from natural ventilation shafts in urban tunnels

et al. 2018

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Summary Investigation of natural ventilation using shafts in tunnels has been receiving more attentions; however, analyses on how fire position influences the natural ventilation performance have rarely been addressed. This study investigated the influence of different fire positions between two shafts on natural ventilation effectiveness in a tunnel by large eddy simulation. The smoke movement characteristics were studied in detail, with systematically varying the fire position between two shafts and the longitudinal wind speed in the tunnel. The typical smoke characteristic parameters, such as temperature distribution, mass flow rate and CO concentration were emphatically investigated. Some special phenomena, such as plug‐holing and smoke bifurcation, were also discussed.

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Experimental investigation on the effect of asymmetrical sealing on tunnel fire behavior

Cited by 95 publications

References 25 publications

Experimental study on flame merging behaviors from two pool fires along the longitudinal centerline of model tunnel with natural ventilation

Experimental study on flame merging behaviors from two pool fires along the longitudinal centerline of model tunnel with natural ventilation

Study on the flame morphological characteristics of dual fire sources in tunnel under longitudinal ventilation

Effects of fire location on the capacity of smoke exhaust from natural ventilation shafts in urban tunnels

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