Fire Science and Engineering (한국화재소방학회논문지)

Korean Institute of Fire Science and Engineering (한국화재소방학회)
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FDS Simulation and Validation on the Under-Ventilated Compartment Fires

환기부족 구획화재에 대한 FDS 해석 및 검증

  • Published : 2009.10.31
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Abstract

In this study, fire simulations on the under-ventilated compartment fires have been conducted using the Fire Dynamics Simulator (FDS Ver. 5.2) and its prediction performance on the thermal and combustion chemical characteristics has been discussed. The temperature and chemical species concentrations in the upper layer of methane, heptane, and toluene fires located in a 2/5 scale compartment based on the ISO-9705 standard room are predicted and compared with the previously published experimental data. The results showed that the FDS simulations reproduced well the temperature of the ceiling and the mixture fraction in the upper layer under the well-ventilation conditions. For the under-ventilated fires, which were taken place due to the insufficient oxygen entrainment, the prediction by the FDS significantly under-estimated the production of carbon monoxide and soot compared to the experimental data.

본 연구에서는 환기부족 조건의 구획화재에 대하여 FDS(Ver. 5.2)를 이용하여 수치해석을 수행하였고 열적 특성 및 연소 가스 생성 특성에 대한 예측성능을 평가하였다. ISO-9705 표준화재실의 2/5 크기 모형에 대한 메탄 및 헵탄, 톨루엔 화재를 모사하였으며 고온 상층부의 온도, 연소가스 농도 등에 대하여 기존의 실험 결과와 비교하였다. 실험결과와의 비교를 통해 FDS가 천정의 온도와 과환기 조건의 혼합분율의 예측에 있어서 좋은 성능을 보임을 확인할 수 있었다. 그러나 화재 크기에 비해 산소의 유입량이 충분치 않은 환기부족 조건에서는 일산화탄소 및 그을름의 발생량을 실험값에 비해 크게 하향 예측하였다.

Keywords

References

  1. J.G. Quintiere, W. J. Rinkinen and W.W. Jones 'The Effect of Room Opening on Fire Plume Entrainment', Comb. Sci. Tech., Vol.26, pp.193-201 (1981) https://doi.org/10.1080/00102208108946960
  2. C.L. Beyler, 'Major Species Production by Diffusion Flames in a Two-Layer Compartment Fire Environment', Fire Safety Journal, Vol.10, pp.47-56(1986) https://doi.org/10.1016/0379-7112(86)90031-7
  3. W.M. Pitts, 'The Global Equivalence Ratio Concept and the Formation Mechanism of Carbon Monoxide in Enclosure Fire', Prog. Ener. Comb. Sci., Vol.21, pp.197-237 (1995) https://doi.org/10.1016/0360-1285(95)00004-2
  4. P. Blomqvist and A. Lonnermark, 'Characterization of the Combustion Products in Large-Scale Fire Tests; Comparison of Three Experimental Configurations', Fire and Materials, Vol.25, pp.71-81(2001) https://doi.org/10.1002/fam.761
  5. R.G. Gann, J.D. Averill, E.L. Johnsson, M.R. Nyden and R.D. Peacock, 'Smoke Component Yields from Room-Scale Fire Tests', NIST TN 1453, NIST, Maryland(2003)
  6. M. Bundy, A. Hamins, E.L. Johnsson, S.C. Kim, G.H. Ko and D.B. Lenhert, 'Measurement of Heat and Combustion Products in Reduced-Scale Ventilation-Limited Compartment Fires', NIST TN 1483, NIST, Maryland(2007)
  7. K.B. McGrattan, S. Hostikka, J.E. Floyd, H.R. Baum and R.G. Rehm, 'Fire Dynamics Simulator (Version 5), Technical Reference Guide', NIST SP 1018-5, NIST, Maryland (2007)
  8. K.B. McGrattan and A. Hamins, 'Numerical Simulation of the Howard Street Tunnel Fire', Fire Technology, Vol.42, No.4, pp. 273-281(2006) https://doi.org/10.1007/s10694-006-7506-9
  9. 전홍균, 최영상, 추홍록, '다세대주택의 화재안전평가에 대한 수치해석 연구', 한국화재소방학회 논문지, 제21권, 제3호, pp.15-23(2007)
  10. G.H. Ko, A. Hamins, M. Bundy, E.L. Johnsson, S.C. Kim and D.B. Lenhert, 'Mixture Fraction Ananlysis of Combustion Products in the Upper Layer of Reduced-Scale Compartment Fires', Comb. Flame, Vol.156, pp.467-476(2009) https://doi.org/10.1016/j.combustflame.2008.08.012
  11. A. Tewarson, 'Generation Heat and Chemical Compounds in Fires', Section 3, SFPE Handbook of Fire Protection Engineering(2002)
  12. 김성찬, 고권현, 이성혁, '생성율 개념에 기초한 화재모델의 신뢰성에 대한 연구', 한국화재소방학회 논문지, 제23권, 제4호, pp.130-136(2009)