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Use of Water Curtains to Prevent Ignition by Firebrands

Conference paper
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Abstract

Spotting ignition by airborne firebrands is one of key mechanisms in forest fire propagation. This paper makes an evaluation of possible use of water sprays to prevent propagation of firebrands. Presented mathematical model allows the evaluation of required spray parameters to be made. The model is based on Lagrangian approaches for both firebrands and water droplets. Analytical solutions are obtained for the trajectories. Parameters of the spray required to prevent firebrand propagation are evaluated in terms of the spray outmost discharge angles and flow rate. © Springer 2015. Selection and peer-review under responsibility of the Asia-Oceania Association for Fire Science and Technology.

Keywords

Firebrands Water spray Lagrangian models 

Nomenclature

d

Diameter

f

External force (gravity)

F

Force exerted by spray

H

Heaviside function

t

Time

V

Velocity

x,r

Cartesian coordinates

Greek Symbols

α

Parameter

ρ

Density

Subscripts

0,1

Firebrand/droplet

f

Final

x,r

Longitudinal/radial

Notes

Acknowledgement

The author is grateful to Inga Novozhilov for her help in preparing the manuscript.

References

  1. 1.
    Koo E, Pagni PJ, Weise DR, John P, Woycheese JP (2010) Firebrands and spotting ignition in large-scale fires. Int J Wildland Fire 19:818–843CrossRefGoogle Scholar
  2. 2.
    Garzon VE, McDonough JM, Saito K (1998) Time dependent model of forest fire spread in turbulent gusting winds. In: Keltner NR, Alvares NJ, Grayson SJ (Ed) Very large-scale fires. American Society for Testing and Materials, West Conshohocken, PA, pp 73–83Google Scholar
  3. 3.
    Novozhilov V (2010) On some integrable cases of particle motion in a fluid, Math Eng Sci Aerosp 1(4):371–380MathSciNetzbMATHGoogle Scholar
  4. 4.
    Novozhilov V (2014) Water spray dynamics in fire flows. Proceedings of the eleventh international symposium on fire safety science, International Association for Fire Safety ScienceGoogle Scholar

Copyright information

© Springer Science+Business Media Singapore 2017

Authors and Affiliations

  1. 1.CESARE, Victoria UniversityWerribeeAustralia

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