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Generalized Blaze Flash, a “Flashover” Behavior for Forest Fires—Analysis from the Firefighter’s Point of View

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DOI: 10.4236/ojf.2014.45059    3,107 Downloads   3,658 Views   Citations


The phenomenon called “flashover” or “eruptive fire” in forest fires is characterized by a sudden change in fire behavior: everything seems to burst into flames instantly and firefighters are overwhelmed by a sort of eruption, spreading at a speed at far several meters per second. Unfortunately it has cost several lives in the past. The reasons for such an accident always create controversy in the research field. Different theories are highlighted and especially two major axes are currently subject to discussion because they are very popular among people involved in fire-fighting. The one with regard to VOCs emissions is the best-known among firemen. Under great heat, during summer or with a fire approaching, plants emit VOCs and the more the temperature grows, the more the amount of VOCs emitted grows. Under specific conditions (essentially topographical, meteorological and atmospheric), the cloud of gas can accumulate in an appropriate zone. The concentration of VOCs may therefore reach the Lower Explosive Limit, triggering the burst of the cloud when in contact with the fire. The second theory depends on physical considerations. An example is based on a convective flow created by the fire itself. When a fire spreads on a slope, it creates an aspiration phenomenon in a way to supply the fire with oxygen. The more this phenomenon is important, the more the flames tilt and increase the rate of speed, needing even more oxygen and thus induced flow. This vicious circle can stabilize or have an erratic behavior to trigger off a fire eruption. This article presents these two theories, and especially the new advances on this research subject.

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The authors declare no conflicts of interest.

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Chatelon, F. , Sauvagnargues, S. , Dusserre, G. and Balbi, J. (2014) Generalized Blaze Flash, a “Flashover” Behavior for Forest Fires—Analysis from the Firefighter’s Point of View. Open Journal of Forestry, 4, 547-557. doi: 10.4236/ojf.2014.45059.


[1] Albini, F. A. (1976) Estimating Wildfire Behaviour and Effects. USDA Forest Service, General Technical Report INT-30, Intermountain Forest and Range Experiment Station, Ogden, Utah, 92 p. 74 ref.
[2] Albini, F. A. (1982) Response of Free-Burning to Nonsteady Wind. Combustion Science and Technology, 29, 225-241.
[3] Balbi, J. H., Rossi, J. L., Marcelli, T., & Santoni, P. A. (2007) A 3D Physical Real-Time Model of Surface Fires across Fuel Beds. Combustion Science and Technology, 179, 2511-2537.
[4] Balbi, J. H., Rossi, J. L., Marcelli, T., & Chatelon, F. J. (2010) Physical Modeling of Surface Fire under Nonparallel Wind and Slope Conditions. Combustion Science and Technology, 182, 922-939.
[5] Barboni, T. (2006) Caractérisation chimique d’un hybride de clémentine et du myrte commun. Etude de cas d’embrasement generalisé éclair par la détermination des COVb. Analyse des fumées issues de la combustion des végétaux. Ph.D Thesis, Corte: University of Corsica.
[6] Butler, B. W., Bartlette, R. A., Bradshaw, L. S., Cohen, J. D., Andrews, P. L., Putnam, T., & Mangan, R. J. (1998). Fire Behavior Associated with the 1994 South Canyon Fire on Storm King Mountain, Colorado. Research Paper RMRS-RP-9, Ogden, UT, USDA, Forest Service, Rocky Mountain Research Station, 82 p.
[7] Byram, G. M. (1954) Atmospheric Conditions Related to Blowup Fires. Southeastern Forest Experiment Station, Ashville, NC, Station Paper 35, April 1954.
[8] Byram, G. M. (1959) Combustion of Forest Fuels. In K. P. Davis (Ed.), Forest Fire: Control and Use. New York: McGraw Hill.
[9] Carbonell, G., Monet, J. P., Dusserre, G., & Sauvagnargues-Lesage, S. (2004) Embrasement generalisé éclair en feu de forêt. Rapport EMA-SDIS 13, 153.
[10] Chatelon, F. J., Balbi, J. H., Rossi, J. L., Filippi, J. B., Marcelli, T., Rossa, C., & Viegas, D. X. (2011) The Importance of Fire Front Width in the Anticipation of Eruptive Fires. Proceedings of the Seventh Mediterranean Combustion Symposium, Chia Laguna, Cagliari, 11-15 September 2011, 12.
[11] Chetehouna, K., Barboni, T., Zarguili, I., Simeoni, A., & Fernandez-Pello, A. C. (2009). Investigation on the Emission of Volatile Organic Compounds from Heated Vegetation and Their Potential to Cause an Accelerating Forest Fire. Combustion Science and Technology, 181, 1273-1288.
[12] Courty, L. (2012). Etude de l’émission et des propriétés de combustion des composés organiques volatils potentiellement impliqués dans les feux de forets accélérés. Ph.D. Thesis, Poitiers: University of Poitiers.
[13] Dold, J. W., Simeoni, A., Zinoviev, A., & Weber, R. (2009a). The Palasca Fire. September 2000: Eruption of Flashover? In D. X. Viegas (Ed.), Recent Forest Fire Accidents in Europe, Ispra: European Commission.
[14] Dold, J. W., & Zinoviev, A. (2009b). Fire Eruption through Intensity and Spread Rate Interaction Mediated by Flow Attachment. Combustion Theory and Modelling, 13, 763-793.
[15] Dold, J. W. (2010). Flow Attachment in Eruptive Fire Growth. Proceedings of the 6th International Conference on Forest Fire Research, Coimbra, 18-19 November 2010.
[16] Dold, J. W., Zinoviev, A., & Leslie, E. (2011). Intensity Accumulation in Unsteady Firelines: A Simple Model for Vegetation Engagement. Fire Safety Journal, 46, 63-69.
[17] Marcelli, T., Balbi, J. H., Moretti, B., Rossi, J. L., & Chatelon, F. J. (2011). Flame Height Model of a Spreading Surface Fire. Proceedings of the 7th Mediterranean Combustion Symposium, Cagliari, 11-15 September 2011.
[18] Mason, W., & Wheeler, R. V. (1918). The Effect of Temperature and of Pressure on the Limits of Inflammability of Mixtures of Methane and Air. Journal of the Chemical Society, Transactions, 113, 45-57.
[19] National Fire Protection Association: NFPA (2011). Guide for Fire and Explosion Investigations, NFPA 921.
[20] Peuch, E. (2007). Wildfire Safety: Feedback on Sudden Ignitions Causing Fatalities. 4th International Wildland Fire Conference, Sevilla, 3-17 May 2007.
[21] Sharples, J. J., Gill, A. M., & Dold, J. W. (2010). The Trench Effect and Eruptive Wildfires: Lessons from the King’s Cross Underground Disaster. Proceedings AFAC 2010.
[22] Stipanicev, D., & Viegas, D. X. (2009). The Accident of Kornati (Croatia) 2007. In D. X. Viegas (Ed.), Recent Forest Fire Related Accidents in Europe, JRC Scientific and Technical Reports, (pp. 26-53). Luxembourg: Office for Official Publications of the European Communities.
[23] Viegas, D. X., Cruz, M. G., Ribeiro, L. M., Silva, A. J., Ollero, A., Arrue, B., Dios, R., Gomez-Rodriguez, F., Merino, L., Miranda, A. I., & Santos, P. (2002). Gestosa Fire Spread Experiments. Proceedings of the 4th International Conference on Forest Fire Research and Wildland Fire Safety, Luso, 18-23 November 2002.
[24] Viegas, D. X. (2004a). A Mathematical Model for Forest Fire Blowup. Combustion Science and Technology, 177, 27-51.
[25] Viegas, D. X. (2004b). On the Existence of a Steady State Regime for Slope and Wind Driven Fires. International Journal of Wildland Fire, 13, 101-117.
[26] Viegas, D. X., & Pita, L. P. (2004). Fire Spread in Canyons. International Journal of Wildland Fire, 13, 253-274.
[27] Viegas, D. X., & Simeoni, A. (2010). Eruptive Behaviour of Forest Fires. Fire Technology, 47, 303-320.

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