The effect of fuel area size on behavior of fires in a reduced-scale single-track railway tunnel

Chen, Changkun; Zhu, Cong-xiang; Liu, Xuanya; Heng, Kang; Zeng, Jia-wei; Yang, Jian

doi:10.1016/j.tust.2015.12.002

Cited by 29 publications

(2 citation statements)

References 39 publications

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“…The conclusion drawn from this work is under the proposed scenario with a fixed heat release rate, a straight tunnel (without considering the effects of tunnel slope and curvature) and windless environment inside and outside the tunnel. [56][57][58][59] The key parameters focused on and varied systematically here are the naturally ventilated shaft and fire locations. In our future work, other parameters, which will also influence the smoke movement inside the tunnel, will be studied in detail.…”

Section: Discussionmentioning

confidence: 99%

A numerical study on the effects of naturally ventilated shaft and fire locations in urban tunnels

Fan

Chen

Mao³

et al. 2019

Fire and Materials

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Summary In more and more tunnels, natural ventilation mode with vertical shafts has been gradually employed. However, there are few studies investigating the influences of fire and shaft positions on natural ventilation performance currently. Therefore, this study investigated the effects of the transverse distance from fire source to tunnel sidewall, the longitudinal distance from fire source to shaft, and the transverse distance from shaft to sidewall on natural ventilation effectiveness in a tunnel fire by using Fire Dynamics Simulator. The typical characteristic parameters of smoke, such as mass flow rate, temperature distribution, and velocity vector were analyzed; besides, the phenomenon of plug‐holing was discussed. The results have shown that the mass flow rate of gas exhausted by the shaft decreases slightly with the increase of longitudinal distance from fire source to shaft. When the longitudinal distance from fire source to shaft is constant, changing the transverse distance from shaft to sidewall will have a more obvious effect on the effectiveness of exhausting smoke than changing the transverse distance from fire source to sidewall; in addition, the phenomenon of plug‐holing is more serious when the shaft is close to the sidewall.

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Section: Discussionmentioning

confidence: 99%

A numerical study on the effects of naturally ventilated shaft and fire locations in urban tunnels

Fan

Chen

Mao³

et al. 2019

Fire and Materials

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“…In case of tunnel fire, the smoke is not easy to be exhausted, which makes it difficult for evacuation and rescue operations. 1,2 According to statistics, more than 85% of the casualties in tunnel fires are caused by inhalation of toxic smoke caused by suffocation or poisoning. 3 At present, scholars have done a lot of research on tunnel fires, such as the variation of the rule of smoke back-layering length, [4][5][6][7][8][9][10] smoke temperature, [11][12][13][14][15][16] the distribution characteristics of smoke, the critical ventilation velocity in the tunnel, [17][18][19] etc.…”

Section: Introductionmentioning

confidence: 99%

Study on the variation rule of smoke back‐layering length of tunnel ceiling jet induced by strong fire plume

Chen

Zhou

et al. 2022

Fire and Materials

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Tunnel fire is a major research topic in tunnel safety. Because of the tunnel's narrow and enclosed structure, smoke movement plays an important role in the investigation of the tunnel fire. In this paper, the Froude similarity principle is used to study the variation rule of the smoke back-layering length of tunnel ceiling jet induced by strong fire plume with different heat release rates, longitudinal ventilation velocities, and effective heights of fire source analyzed. It is found that the smoke back-layering length of tunnel ceiling jet induced by strong fire plume increases with the increase of effective height of fire source and decreases with the increase of longitudinal ventilation velocity. When the heat release rate is relatively small (Q < 60kW), the smoke back-layering length of the tunnel ceiling jet induced by strong fire plume increases as the heat release rate increases. However, for the larger heat release rate (Q ≥ 60kW), the smoke back-layering length of the tunnel ceiling jet induced by strong fire plume is mainly related to the longitudinal ventilation velocity. Based on Thomas's model and Li's model, by introducing the correction coefficient, correction formulas of the smoke back-layering length of tunnel ceiling jet induced by strong fire plume changing with the effective height of fire source are proposed.

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Experimental Investigation on Temperature Profiles at Ceiling and Door of Subway Carriage Fire

2020

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The effect of fuel area size on behavior of fires in a reduced-scale single-track railway tunnel

Cited by 29 publications

References 39 publications

A numerical study on the effects of naturally ventilated shaft and fire locations in urban tunnels

A numerical study on the effects of naturally ventilated shaft and fire locations in urban tunnels

Study on the variation rule of smoke back‐layering length of tunnel ceiling jet induced by strong fire plume

Experimental Investigation on Temperature Profiles at Ceiling and Door of Subway Carriage Fire

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