Influence of relative location of two openings on fire and smoke behaviors in stairwell with a compartment

Ji, Jie; Wan, Huaxian; Li, Yifan; Li, Kaiyuan; Sun, Jinhua

doi:10.1016/j.ijthermalsci.2014.10.008

Cited by 40 publications

(13 citation statements)

References 23 publications

(35 reference statements)

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“…Takeda et al conducted an experiment to study the burning rate in the compartment with dual opening; it was found that the neutral plane height at the door opening was significantly influenced by the dimension of the window opening. J. Ji et al studied the stack effect in high rise building influence on the burning rate in compartment and a parameter is introduced to determine the control mechanism of combustion. Chen et al studied the cross‐flow ventilation influence on the time to flashover, fire room temperature, and heat release rate of compartment fire.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of fire growth and ejected plume in a cross‐ventilation compartment under wind condition

Gao

et al. 2019

Fire and Materials

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Summary In this study, a set of reduced‐scale experiments were conducted to study the influence of external wind on the fire growth and ejected plume in a compartment with two openings. The approaching wind velocity was set as 1.5 and 3.0 m/s, respectively. The temperatures in the fire compartment were also measured by thermocouple matrixes. The images of the projected flames from the opening and the fuel mass loss rate were recorded by digital video and electronic balance, respectively. It is observed that the wind with velocity of 1.5 m/s can reduce the combustion severity by decreasing the ventilation in the fire room and enhance the duration time of combustion. On the contrary, the wind with velocity of 3 m/s can promote the combustion severity by increasing the ventilation in the fire room and reduce the duration time of combustion. The theoretical analysis shows how the external wind that coupled with the thermal buoyance influence the ventilation of the compartment, and a critical velocity or a dimensional number are suggested to predict the ventilation of the fire room, which is believed to influence the compartment fire behavior greatly.

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Section: Introductionmentioning

confidence: 99%

Experimental study of fire growth and ejected plume in a cross‐ventilation compartment under wind condition

Gao

et al. 2019

Fire and Materials

Self Cite

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“…Tang proposed a characteristic length l and deduced a formula describing the correlation between the flame height and D 0 / l . Besides, Ji et al studied the influence of relative location of two openings on fire and smoke behaviors in stairwell (vertical channel) with a compartment. Obviously, most of the above works focused on burning and window ejected flame, rather than the flame spread behavior.…”

Section: Introductionmentioning

confidence: 99%

Study on downward flame spread over extruded polystyrene foam in a vertical channel: Influence of opening area

Yin

Chen

et al. 2018

Fire and Materials

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Summary Experimental methods and theoretical analysis are employed to investigate effects of channel opening area on downward flame spread characteristics of extruded polystyrene (XPS) thermal insulation materials on building facade. The average flame height first drops and then rises as dimensionless opening area (the ratio of sidewall opening area to sidewall area, ie, S*) increases. As S* rises, both the average and maximum temperature of the curtain wall decrease, and the decreasing of the average temperature is linear. XPS surface temperature history can be divided into four stages, ie, inapparent rising stage (preheating), significant rising stage (melting), dropping stage (pyrolysis), and rerising stage (ignition). The preheating length first rises and then drops as S* increases. The XPS flame spreads steadily at the early period while acceleration occurs at the later period. For different opening areas, the difference in spread distance history is not apparent in the early stage while this difference is significant in the later stage. The flame spread rate (Vf) first increases and then decreases as S* rises. A downward flame spread model for XPS in vertical channel with openings is built. The varied trend of Vf predicted using this model corresponds to the experimental result.

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“…In previous studies, investigations into the stack effect in building fires with a single physical structure have been reported. 4–16 Ji et al. 4 stated that the position of a single shaft opening could influence the stack effect strength and the neutral plane location, and the flame deflection would be affected by that.…”

Section: Introductionmentioning

confidence: 99%

“…5,6 and Ji et al. 7 studied the effect of relative location between fire floor and multi-opening on fuel burning rate. They pointed out that the location of openings could influence the stack effect and could also enhance or suppress the combustion.…”

Section: Introductionmentioning

confidence: 99%

Effects of ventilation state of vertical shaft on fire tilt direction and smoke migration behaviours in a multi-storey building

Huang

Zhou

Cao

et al. 2018

Indoor and Built Environment

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Influence of relative location of two openings on fire and smoke behaviors in stairwell with a compartment

Cited by 40 publications

References 23 publications

Experimental study of fire growth and ejected plume in a cross‐ventilation compartment under wind condition

Experimental study of fire growth and ejected plume in a cross‐ventilation compartment under wind condition

Study on downward flame spread over extruded polystyrene foam in a vertical channel: Influence of opening area

Effects of ventilation state of vertical shaft on fire tilt direction and smoke migration behaviours in a multi-storey building

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