Advertisement

Suppression of the Thermal Decomposition Reaction of Forest Combustible Materials in Large-Area Fires

  • R. S. Volkov
  • A. O. Zhdanova
  • G. V. Kuznetsov
  • P. A. Strizhak
HEAT AND MASS TRANSFER IN COMBUSTION PROCESSES

Experimental investigations on the characteristic time of suppression of the thermal decomposition reaction of typical forest combustible materials (aspen twigs, birch leaves, spruce needles, pine chips, and a mixture of these materials) and the volume of water required for this purpose have been performed for model fire hotbeds of different areas: SFCM = 0.0003–0.007 m2 and SFCM = 0.045–0.245 m2. In the experiments, aerosol water flows with droplets of size 0.01–0.25 mm were used for the spraying of model fire hotbeds, and the density of spraying was 0.02 L/(m2·s). It was established that the characteristics of suppression of a fire by an aerosol water flow are mainly determined by the sizes of the droplets in this flow. Prognostic estimates of changes in the dispersivity of a droplet cloud, formed from large (as large as 0.5 L) "drops" (water agglomerates) thrown down from a height, have been made. It is shown that these changes can influence the conditions and characteristics of suppression of a forest fire. Dependences, allowing one to forecast the characteristics of suppression of the thermal decomposition of forest combustible materials with the use of large water agglomerates thrown down from an aircraft and aerosol clouds formed from these agglomerates in the process of their movement to the earth, are presented.

Keywords

forest combustible materials thermal decomposition hotbed of fire aerosol flow water mass 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    A. Dimitrakopoulos, C. Gogi, G. Stamatelos, and I. Mitsopoulos, Statistical analysis of the fire environment of large forest fires (>1000 ha) in Greece, Pol. J. Environ. Stud., 20, 327–332 (2011).Google Scholar
  2. 2.
    F. X. Catry, F. C. Rego, F. Moreira, and F. Bacao, Characterizing and modelling the spatial patterns of wildfire ignitions in Portugal: Fire initiation and resulting burned area, 1st Int. Conf. on Modelling, Monitoring, and Management of Forest Fires, 17–18 September 2008, Spain (2008), Vol. 119, pp. 213–221.Google Scholar
  3. 3.
    D. H. Klyde, D. J. Alvarez, P. C. Schulze, T. H. Cox, and M. Dickerson, Limited handling qualities assessment of very large aerial tankers for the wildfire suppression mission, AIAA Atm. Flight Mech. Conf., 2–5 August 2010, Canada (2010), Code 97625.Google Scholar
  4. 4.
    L. Merino, F. Caballero, J. R. Martínez-De-Dios, I. Maza, and A. Ollero, An unmanned aircraft system for automatic forest fire monitoring and measurement, J. Intell. Robot. Syst., 65, Issues 1–4, 533–548 (2012).Google Scholar
  5. 5.
    A. Yu. Pidzhakov, F. N. Reshetskii, and O. V. Gavrilova, Use of aircrafts of the Ministry of Emergency Situations of Russian for suppression of forest fires, Vestn. Sankt-Peterb. Univ. Gos. Protivop. Sluzhby MChS Rossii, No. 1, 68–71 (2011).Google Scholar
  6. 6.
    E. A. Moskvilin, Use of aircrafts for suppression of forest fires, Pozhar. Bezopasnost′, No. 1, 89–92 (2009).Google Scholar
  7. 7.
    I. R. Khasanov, V. S. Gorshkov, and E. A. Moskvilin, Parameters of the process of suppression of forest fires in the case of supply of water by aircrafts, in: Proc. Int. Conf. "Forest and Steppe Fires: Appearance, Propagation, Suppression, and Subsequences for the Environment," 25–29 September 2001, Irkutsk (2001), pp. 157–158.Google Scholar
  8. 8.
    I. R. Khasanov and E. A. Moskvilin, Aviation methods for suppression of large forest fires, in: Proc. XV Sci.-Pract. Conf. "Problems of Combustion and Suppression of Fires at the Turn of the Century," Moscow (1999), Part 1, pp. 300–301.Google Scholar
  9. 9.
    A. O. Zhdanova, G. V. Kuznetsov, and P. A. Strizhak, Numerical investigation of physicochemical processes occurring during water evaporation in the surface layer pores of a forest combustible materials, J. Eng. Phys. Thermophys., 87, No. 4, 773–781 (2014).CrossRefGoogle Scholar
  10. 10.
    R. S. Volkov, A. O. Zhdanova, O. V. Vysokomornaya, G. V. Kuznetsov, and P. A. Strizhak, Mechanism of liquid drop deformation in subsonic motion in a gaseous medium, J. Eng. Phys. Thermophys., 87, No. 6, 1351–1361 (2014).CrossRefGoogle Scholar
  11. 11.
    A. O. Zhdanova, G. V. Kuznetsov, and P. A. Strizhak, Evaporation of water in the process of movement of its large masses through a high-temperature gas medium, J. Eng. Phys. Thermophys., 88, No. 5, 1145–1153 (2015).CrossRefGoogle Scholar
  12. 12.
    J. Westerweel, Fundamentals of digital particle image velocimetry, Meas. Sci. Technol., 8, 1379–1392 (1997).CrossRefGoogle Scholar
  13. 13.
    S. Dehaeck, H. Van Parys, A. Hubin, and J. P. A. J. Van Beeck, Laser marked shadowgraphy: a novel optical planar technique for the study of microbubbles and droplets, Exp. Fluids, 47, No. 2, 333–341 (2009).CrossRefGoogle Scholar
  14. 14.
    A. M. Grishin, Mathematical Models of Forest Fires [in Russian], Izd. Tomsk. Gos. Univ., Tomsk (1981).Google Scholar
  15. 15.
    S. A. Loshchilov, Influence of the Thermokinetic Parameters of the Pyrolysis and the Two-Layerage of Forest Combustible Materials on the Processes of Propagation of Forest Fires, Candidate′s Dissertation (in Physics and Mathematics), R. E. Alekseeev Nizhegor. Gos. Tekh. Univ., Nizhnii Novgorod (2013).Google Scholar
  16. 16.
    A. N. Subbotin, Mathematical model of propagation of a creeping forest fire over a litter or a layer of waste conifer needles, Pozhar. Bezopasnost′, No. 1, 109–116 (2008).Google Scholar
  17. 17.
    A. M. Grishin, V. P. Zima, V. T. Kuznetsov, and A. I. Skorik, Ignition of forest combustible materials by a radiant energy flow, Fiz, Goreniya Vzryva, 38, No. 1, 30–35 (2002).Google Scholar
  18. 18.
    A. M. Grishin, V. V. Reino, V. M. Sazanovich, and R. Sh. Tsvyk, Some results of experimental investigations on the combustion of forest combustible materials, Izv. Vyssh. Ucheb. Zaved., Fizika, 52, No. 12, 28–37 (2009).Google Scholar
  19. 19.
    R. M. Aseeva, B. B. Serkov, and A. B. Sivenkov, Combustion and fire hazard of wood, Pozharovzryvobezopasnost′, 21, No. 1, 19–32 (2012).Google Scholar
  20. 20.
    M. B. Gonchikzhapov, A. A. Paletskii, and O. P. Korobeinichev, Kinetics of the pyrolysis of forest combustible materials in an inert/oxidizing medium at large and small rates of their heating, Sibbezopasnost′-Spassib., No. 1, 38–44 (2012).Google Scholar
  21. 21.
    R. S. Volkov, G. V. Kuznetsov, P. A. Kuibin, and P. A. Strizhak, Weber numbers for the stages of transformation of water agglomerates in their free fall in air, Pis′ma Zh. Tekh. Fiz., 41, No. 20, 103–110 (2015).Google Scholar
  22. 22.
    D. V. Antonov, R. S. Volkov, G. V. Kuznetsov, and P. A. Strizhak, Experimental study of the effects of collision of water droplets in a flow of high-temperature gases, J. Eng. Phys. Thermophys., 89, No. 1, 100–111 (2016).CrossRefGoogle Scholar
  23. 23.
    R. S. Volkov, G. V. Kuznetsov, and P. A. Strizhak, Influence of the initial parameters of a sprayed water on the characteristics of its movement through a counterflow of high-temperature gases, Zh. Tekh. Fiz., 84, No. 7, 15–23 (2014).Google Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • R. S. Volkov
    • 1
  • A. O. Zhdanova
    • 1
  • G. V. Kuznetsov
    • 1
  • P. A. Strizhak
    • 1
  1. 1.National Research Tomsk Polytechnical UniversityTomskRussia

Personalised recommendations