backdraft; under-ventilated fire; flammability limits; diffusion criterion; gas species
Abstract :
[en] Backdraft is a limited-ventilation fire phenomenon closely linked to the unburnt gases accumulated in the fire compartment just before creating an opening that allows a new supply of oxygen to enter the compartment. The aim of this article is to help understanding the influence of gas species such as hydrocarbon CmHn, water, carbon dioxide, oxygen, and nitrogen on backdraft probability. The influence of increasing the number of moles of the above gas species as well as the number of atoms of carbon, hydrogen, and oxygen in the fuel composition is analyzed. For this purpose, a diffusion flame limit criterion based on Le Chatelier's rule is used. In order to verify the obtained results, validation with 41 backdraft experiments is carried out.
Disciplines :
Materials science & engineering
Author, co-author :
Pérez Jiménez, Christian
Franssen, Jean-Marc ; Université de Liège - ULiège > Département Argenco : Secteur SE > Ingénierie du feu
Karlsson, Bjorn
Language :
English
Title :
Influence of gas species on backdraft probability using a diffusion flame limits criterion
Fleischmann, C.M., Pagni, P.J. and Willimson, R.B. (1993). Quantitative Backdraft Experiments, NISTR 5280. National Institute of Standards and Technology, Gaithersburg.
Gojkovic, D. (2001). Initial Backdraft, Department of Fire Safety Engineering - Lund University, Sweden, Report 3121.
Weng, W.G., Hasemi, Y. and Fan, W.C. (2004). Study on Effect of Opening Location on The Occurrence of Backdraft. In: Tenth Interflam Symposium on Fire Science & Engineering, Edinburgh Scotland, Inter-Science Communications, London, pp. 95-103.
Pérez-Jiménez, C. (2005). Simple Numerical Model For Backdraft Risk Assessment. Poster in the IAFSS Eighth International Symposium Fire Safety Science in China.
Simmons, R.F. and Wolfhard, H.G. (1957). Comb. and Flame, 1: 155.
Ishizuka, S. and Tsuji, H. (1971). Eighteenth Symposium (International) on Combustion, The Combustion Institute, Pittsburgh, PA, pp. 1971.
Beyler, C. (1995). Flammability Limits of Premixed and Diffusion Flames, The SFPE Handbook of Fire Protection Engineering, Quincy, MA, pp. 2-147-2-159.
Drysdale, D. (1999). An Introduction to Fire Dynamics, Wiley, New York.
Fleischmann, C.M., Pagni, P.J. and Willimson, R.B. (1993). Exploratory Backdraft Experiments, Fire Technology, 29 (4). 298-316.
Karlsson, B. and Quintiere, J.G. (2000). Enclosure Fire Dynamics, CRC Press (Handbook).
Pérez-Jiménez, C. (2006). Simple Numerical Model For Backdraft Risk Assessment, p. 350, PhD at the University of Liege.
