Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
권호 표지

An Experimental Study on the Effect of Rotation Strength on Fire Whirl Characteristics

회전강도가 Fire Whirl의 특성에 미치는 영향에 관한 실험연구

  • Published : 2005.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

Rotational motion in the atmosphere around a fire may have a profound influence on the fire plume. This process underlies the occurrence of fire whirls. Fire whirls are rare but highly destructive phenomenon which were observed in a large forest, urban and building fires. The present study aims to investigate of the effect of rotation Strength on the fire whirl characteristics expeimentally. Experiments are performed for various sizes of fire source with different rotation strength. From the experimental observations, it is noted that the mean centerline temperature is gradually increased and mean radial temperature is decreased as increases rotation strength. The characteristic mean flame height of fire based on the visible observation is increased as increases of dimensionless swirl parameter, $\Omega/\alpha$, represented by swirl induced motion to buoyancy driven motion.

Keywords

References

  1. F. A. Williams, 'Urban and wild fire phenomenology', Progress in Energy Combustion Science, Vol. 8, pp. 317-354, 1982 https://doi.org/10.1016/0360-1285(82)90004-1
  2. H. W. Emmons and S. J. Ying, 'The fire whirl', Proceedings of the 11th International Symposium on Combustion (Combustion Institute, Pittsburgh, PA), pp. 475-488, 1967
  3. A. Muraszew, J. B. Fedele and W. C. Kuby, 'The fire whirl phenomenon', Combustion and Flame, Vol. 34, pp. 29-45, 1979 https://doi.org/10.1016/0010-2180(79)90077-4
  4. S. Soma and K. Saito, 'Reconstruction of fire whirls using scale models', Combustion and Flame, Vol. 86, pp. 269-284, 1991 https://doi.org/10.1016/0010-2180(91)90107-M
  5. F. Battaglia, K. B. McGrattan, R. G. Rehm and H. R. Baum, 'Simulating fire whirls', Combustion Theory and Modelling, Vol. 4, pp. 122-138, 2000
  6. Bernard J. McCafrrey, 'Purely Buoyant Diffusion Flames: Some Experimental Results' Report No. NBSIR 79-1910, 1979
  7. A. Hamins, T. Kashiwagi, R. Buch, 'Characteristics of pool fire burnings', Fire Resistance of Industrial Fluids, ASTM Special Technical Publication, Vol. 1284, pp. 15-41, 1995 https://doi.org/10.1520/STP1284-EB
  8. E. E. Zukoski., T. Kubota., B. M. Cetegen, 'Entrainment in fire plumes', Fire Safety Journal, Vol. 3, pp. 107-121, 1981 https://doi.org/10.1016/0379-7112(81)90037-0
  9. G. Heskestad, 'Luminous heights of turbulent diffusion flames', Fire Safety Journal, Vol. 5, pp. 103-108, 1983 https://doi.org/10.1016/0379-7112(83)90002-4