Experimental study on burning behavior of crude oil pool fire in annular ice cavities

Kong, De‐Xing; Zhang, Zhen; Ping, Ping; Chen, Guo-Ming; He, Xu; Yang, Hairui

doi:10.1016/j.fuel.2018.07.049

Cited by 38 publications

(13 citation statements)

References 32 publications

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“…In addition, the variations of flame height with pressure of PMMA and PE present the similar law although the flame height of PMMA is higher than PE. Flame height for horizontal pool fire can be scaled with the dimensionless heat release rate, which is proportional to the burning rate for horizontal pool fire considering air entrainment and the fuel's combustion . According to the experimental results as shown in Figure , the burning rate of PMMA is larger than that of PE; thus, the flame height of PMMA is higher than that of PE.…”

Section: Resultsmentioning

confidence: 99%

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Experimental study on flame spread along fuel cylinders in high pressures

et al. 2019

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Summary Flame spread over solid fuels in high‐pressure situations, such as nuclear containment shells during a pressurized period, has potential to result in catastrophic disaster, thus requiring further knowledge. This paper experimentally reveals the flame spread behaviors over fuel cylinders in high pressures. Polyethylene and polymethyl‐methacrylate cylinders with the diameter of 4.0 mm are used in this study. Ambient gas is air, and total pressures are varied from naturally normal pressure (100 kPa) to elevated pressure (500 kPa). Flame characteristics including flame appearance and flame size and burning rate and flame spread rate are investigated. Results show that in high pressure, the flame appearance is significantly affected. As the pressure increases, the blue flame disappeared, and the color of flame tip changes from luminous yellow to orange as well the orange part extends down towards the base of flame. The dimensionless flame height increases with pressure for pressure below 150 kPa and then decreases with pressure above that level. The burning rates show increasing trend with pressure and are proportional to P0.6 and P0.79 for polymethyl‐methacrylate and polyethylene, respectively. Besides, flame spread rates for polymethyl‐methacrylate and polyethylene both were found to be proportional to P0.5.

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Section: Resultsmentioning

confidence: 99%

“…As shown in Figure 4 air entrainment and the fuel's combustion. 25 According to the experimental results as shown in Figure 8, the burning rate of PMMA is larger than that of PE; thus, the flame height of PMMA is higher than that of PE.…”

Section: Flame Heightmentioning

confidence: 89%

Experimental study on flame spread along fuel cylinders in high pressures

et al. 2019

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“…With the increase of tunnel mileage, the driving density of vehicles will also be increased, so the tunnel safety becomes increasingly serious. Fire is one of the disasters, which may occur in the tunnel, as the vehicles always carry a lot of solid, liquid, and gaseous combustibles . When a fire occurs in the tunnel, because of its long‐narrow structure, hot smoke will quickly spread throughout the tunnel, and it will be difficult to be discharged in time .…”

Section: Introductionmentioning

confidence: 99%

“…Fire is one of the disasters, which may occur in the tunnel, [9][10][11][12][13][14][15][16][17][18][19][20] as the vehicles always carry a lot of solid, liquid, and gaseous combustibles. [21][22][23] When a fire occurs in the tunnel, because of its long-narrow structure, hot smoke will quickly spread throughout the tunnel, and it will be difficult to be discharged in time. [24][25][26][27][28] The toxic gases produced by fire source will seriously affect the evacuation of stranded persons and rescue work of fire department.…”

Section: Introductionmentioning

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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“…Fires can cause traffic congestion and lead to serious casualties. [8][9][10][11] Many tunnel fire cases show that the toxic smoke is the main cause of casualties 12-14 ;thus, how to effectively control the smoke is an important issue for emergency ventilation and smoke exhaust in tunnel fires. [15][16][17][18] There are mainly two kinds of ventilation systems in tunnels, that is, natural ventilation and mechanical ventilation with jet fans.…”

mentioning

confidence: 99%

Study on the heat exhaust coefficient and smoke flow characteristics under lateral smoke exhaust in tunnel fires

Liu

et al. 2019

Fire and Materials

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Summary The heat exhaust coefficient and smoke flow characteristics under lateral smoke exhaust in tunnel fires were studied in this paper. Through the dimensional analysis, the dimensionless relationship between the heat exhaust coefficient, heat release rate, exhaust vent size, and exhaust velocity was obtained. In addition, this paper also studied the effect of the lateral exhaust vent on the smoke flow field. Results showed that the lateral smoke exhaust caused strong air entrainment on the downstream of the exhaust vent and boundary layer separation on the upstream of the exhaust vent. As the exhaust velocity increased, the degree of air entrainment gradually increased, and the smoke layer near the exhaust vent gradually became thinning and plug‐holing phenomenon occurred; meanwhile, the boundary layer separation would be suppressed or disappear, but the increase of the heat release rate would enhance the boundary layer separation. As the exhaust vent got narrower, the air entrainment downstream of the exhaust vent was reduced, and the boundary layer separation also got weaker.

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Experimental study on burning behavior of crude oil pool fire in annular ice cavities

Cited by 38 publications

References 32 publications

Experimental study on flame spread along fuel cylinders in high pressures

Experimental study on flame spread along fuel cylinders in high pressures

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

Study on the heat exhaust coefficient and smoke flow characteristics under lateral smoke exhaust in tunnel fires

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