Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Numerical Study on the Effects of Spray Properties of Water Mist on the Fire Suppression Mechanism

미분무수 특성이 화재억제 메커니즘에 미치는 영향에 대한 수치해석적 연구

  • 배강열 (대명GENT 기술연구소) ;
  • 정희택 (경상대학교 기계공학부, 항공기부품기술연구소) ;
  • 김형범 (경상대학교 기계공학부)
  • Received : 2017.09.22
  • Accepted : 2017.12.01
  • Published : 2017.12.30
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Abstract

The numerical investigation on the effects of water-mist characteristics has been carried out for the fire suppression mechanism. The FDS are used to simulate the interaction of fire plume and water mists, and program describes the fire-driven flows using LES turbulence model, the mixture fraction combustion model, the finite volume method of radiation transport for a non-scattering gray gas, and conjugate heat transfer between wall and gas flow. The numerical model is consisted of a rectangular enclosure of $L{\times}W{\times}H=1.5{\times}1.5{\times}2.0m^3$ and a water mist nozzle that be installed 1.8 m from fire pool. In the present study, the parameters of nozzle for simulation are the droplet size and the spray velocity. The droplet size influences to fire flume on fire suppression more than the spray velocity because of the effect of the terminal velocity. The optimal condition for fire suppression is that the droplet size and the spray velocity are $100{\mu}m$ and 20 m/s respectively.

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References

  1. S. Kim and H. Ryou, "An Experimental and Numerical Study on Fire Suppression using a Water Mist in an Enclosure", Building and Environment, Vol. 38, No. 11, 2003, pp. 1309-1316. https://doi.org/10.1016/S0360-1323(03)00134-3
  2. S. Kim and H. Ryou, "The Effect of Water Mist on Burning Rates of Pool Fire", Journal of Fire Sciences, Vol. 22, No. 4, 2004, pp. 305-323. https://doi.org/10.1177/0734904104041796
  3. H. Kim, S. Oh and J. Chung, "Effect of Spray Characteristics of Water Mist on the Extinction of a Liquid Pool Fire", Trans. of the KSME(B), Vol. 28, No. 12, 2004, pp. 1591-1599.
  4. M. Kim, Y. Jang and J. Kim, "Burning Rate of a Pool Fir with Downward-directed Spray", Fire Safety Journal, Vol. 27, 1996, pp. 37-48. https://doi.org/10.1016/S0379-7112(96)00024-0
  5. Y. Han, M. Kim and H. Shin, "Extinguishment by the Cooling Effect of the Fuel Surface with Pool Fires", Trans. of Korean Institute of Fire Science and Engineering, Vol. 11, No. 4, 1997, pp. 15-23.
  6. M. Kim, Y. Jang and M. Yoon, "Extinction Limit of a Pool Fire with a Water Mist", Fire Safety Journal, 28, 1997, pp. 295-306. https://doi.org/10.1016/S0379-7112(97)00011-8
  7. J. Hua, K. Kumar, B. Khoo and H. Xue, "A Numerical Study of the Interaction of Water Spray with a Fire Plume", Fire Safety Journal, Vol. 37, 2002, pp. 631-657. https://doi.org/10.1016/S0379-7112(02)00026-7
  8. X. Wang, G. Liao, J. Qin and W. Fan, "Experimental study on the Extinction of a Pool Fire with Water Mist", Journal of Fire Sciences, Vol. 20, 2002, pp. 279-295. https://doi.org/10.1177/073490402762574730
  9. R. Paolo and D. Marino, "The Simulation of Fire Sprinklers Thermal Response in Presence of Water Droplets", Fire Safety Journal, Vol. 39, Issue 8, 2004, pp. 721-736. https://doi.org/10.1016/j.firesaf.2004.07.002
  10. J. Wen, A. Kanga, T. Doncheva and J. Karwatzkia, "Validation of FDS for the prediction of medium-scale pool fires", Fire safety Journal, Vol. 42, Issue 23, 2007, pp. 127-138. https://doi.org/10.1016/j.firesaf.2006.08.007
  11. M. Masahiro, M. Tatsuya, K. Akimitsu, K. Akifume, M. Hirotoshi and S. Hiroaki, "Suppression Mechanism of Water Mist for Pool Fire", Fifteenth Meeting of the UJNR panel on Fire Research and Safety March 1-7, Vol. 1, 2000, pp. 273-279.
  12. J. Lee, J. Kim and T. Kim, "Effect of Properties of Water Mist Droplet on Fire Suppression Time," Proc. ILASS-Korea Annual Meeting, 2016, pp. 19-20.
  13. J. Kim, T. Kim and J. Lee, "Effect of Door Size Variation in a Confined Area on Fire Suppression by Water Mist", Proc. ILASS-Korea Annual Meeting, 2016, pp. 10-13.
  14. Y. Bin, F. Weicheng and L. Guangxuan, "Interaction of Water Mists with a Diffusion Flame in a Confine Space", Fire Safety Journal, Vol. 33, 1999, pp.129-139. https://doi.org/10.1016/S0379-7112(99)00020-X
  15. K. Lee and C. Shin, "Extinguishing Characteristics of Water Mist by Discharge Properties", Trans. of Korean Institute of Fire Science & Engineering, Vol. 15, No. 4, 2001, pp. 41-48.
  16. D. T. Sheppard, "Spray Characteristics of Fire Sprinklers", NIST GCR 02-838, 2002.