Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental and theoretical study on the ejected facade flame behavior from compartment fires under different ventilation conditions
With our country socialist construction and the rapid development of urbanization, the number of high-rise buildings as a national landmark of the city has increased significantly. But also, fire accidents occurred in high-rise buildings frequently. In recent years, high-rise building fire accidents happened with flames ejecting through the openings of the compartments, further inducing large-scale catastrophic fire spread along the building facade due to strong radiation/convection, causing casualties, heavy economic loss and social impact. Thus, building facade fire safety has become an important challenging issue. The flame ejected through the opening stems from the compartment fire. Previous work mainly focused on: combustion and temperature evolution inside the compartment; the evolution of the neutral plane and the critical heat release rate (HRR) for flame ejection through the opening; air entrainment behavior and characteristic parameter distribution of ejected facade fire. In addition, there are also studies on the compartment-facade fire behaviour and characteristic parameters profile for various conditions considering the realistic fire scenario, such as: various fire source conditions inside the compartment (fire source dimension and location); opening characteristics; horizontal eaves above the opening; the presence of a building vertical wall opposite to the opening; the presence of side walls on both sides of the openings; special environmental conditions of sub-atmospheric pressure on a high altitude plateau; and the ambient environment wind effect. It is noted that previous work mainly considered a fixed (or limited number of) fire source location(s), with the window entirely opened, i.e., a ‘complete’ ventilation condition in the sense that the size of the openings is fully available for ventilation. In reality, though, the location of the fire sources (burning surface such as a bed, table or cabinet) can be practically at various elevations above the floor in high-rise building fires; the ...
Experimental and theoretical study on the ejected facade flame behavior from compartment fires under different ventilation conditions
With our country socialist construction and the rapid development of urbanization, the number of high-rise buildings as a national landmark of the city has increased significantly. But also, fire accidents occurred in high-rise buildings frequently. In recent years, high-rise building fire accidents happened with flames ejecting through the openings of the compartments, further inducing large-scale catastrophic fire spread along the building facade due to strong radiation/convection, causing casualties, heavy economic loss and social impact. Thus, building facade fire safety has become an important challenging issue. The flame ejected through the opening stems from the compartment fire. Previous work mainly focused on: combustion and temperature evolution inside the compartment; the evolution of the neutral plane and the critical heat release rate (HRR) for flame ejection through the opening; air entrainment behavior and characteristic parameter distribution of ejected facade fire. In addition, there are also studies on the compartment-facade fire behaviour and characteristic parameters profile for various conditions considering the realistic fire scenario, such as: various fire source conditions inside the compartment (fire source dimension and location); opening characteristics; horizontal eaves above the opening; the presence of a building vertical wall opposite to the opening; the presence of side walls on both sides of the openings; special environmental conditions of sub-atmospheric pressure on a high altitude plateau; and the ambient environment wind effect. It is noted that previous work mainly considered a fixed (or limited number of) fire source location(s), with the window entirely opened, i.e., a ‘complete’ ventilation condition in the sense that the size of the openings is fully available for ventilation. In reality, though, the location of the fire sources (burning surface such as a bed, table or cabinet) can be practically at various elevations above the floor in high-rise building fires; the ...
Experimental and theoretical study on the ejected facade flame behavior from compartment fires under different ventilation conditions
Sun, Xiepeng (Autor:in) / Merci, Bart / Hu, Longhua
01.01.2021
Hochschulschrift
Elektronische Ressource
Englisch
DDC:
624
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