Numerical study of the hazardous factors of a fire in a passenger railway car
DOI:
https://doi.org/10.55630/mem.2025.54.091-100Keywords:
fire modelling, FDS, CFD field model, passenger railway carAbstract
This report presents the results of a numerical modelling of a fire in a typical Bulgarian State Railways passenger compartment railway car using the PyroSim software product. The created numerical model was previously verified through experiments conducted on different scales. This study examines two scenarios of fire development – with the compartment door closed and with the compartment door open, in which the fire occurred. The obtained dependencies of the change in time of two of the dangerous fire factors – loss of visibility and carbon monoxide concentration, which in this case are the most dangerous, were analysed. The obtained results show what is the maximum time for evacuation from the railway car. With the compartment door closed, passengers have about 80 seconds more to evacuate under favourable conditions from the corridor of the railway car.
References
Y. Alarie. Toxicity of Fire Smoke, Critical Reviews in Toxicology, Vol. 32, (2002), 264–282;
С. Арабаджиева. Изследване динамиката на развитие на пожар в ж.п. ваго- ни, Дисертация за придобиване на ОНС „доктор”, Академия на МВР, (2024) [S. Arabadzhieva. Izsledvane dinamikata na razvitie na pozhar v zh.p. vagoni, Diser- tatsiya za pridobivane na ONS „doktor”, Akademiya na MVR, (2024) (in Bulgarian)]
V. Chochev, S. Arabadzhieva. Real full-scale experiment and numerical simu- lation of a fire in a compartment of a passenger railway car. A comparative analysis, Engineering Sciences, LIX, No. 4, (2022), 57-67;
V. Chochev, S. Arabadzhieva, M. Protic. Modeling of fire in a coupe with a closed door in rolling stock, Scientific Journal Safety Engineering, vol. 11, (2021), 15-21;
И. Елисеев, А. Фомин, О. Войтенок. Математическая модель динами- ки распространения опасных факторов пожара в двухэтажных пассажирс- ких вагонах, Научно–технический журнал. Технические средства противо- действия терроризму, Серия 16, (2018), 37–42 [I. Eliseyev, A. Fomin, O. Voytenok. Matematicheskaya model’ dinamiki rasprostraneniya opasnykh faktorov pozhara v dvukhetazhnykh passazhirskikh vagonakh, Nauchno–tekhnicheskiy zhur- nal. Tekhnicheskiye sredstva protivodeystviya terrorizmu, Seriya 16, (2018), 37–42 (in Russian)]
M. Hurley, D. Gottuk, J. Hall, K. Harada, E. Kuligowski, M. Pu- chovsky, J. Torero, J. Watts, C. Wieczorek. Handbook of Fire Protection Engineering, 5th ed., Springer, New York, NY, USA, 2016;
A. Kazemipour. Investigation of Fire Growth and Spread in a Model-Scale Railcar Using an Applied Approach, Journal of Applied Fluid Mechanics, Vol. 9, No. 1, (2016), 279-292;
K. McGrattan, R. McDermott, M. Vanella, S. Hostikka, J. Floyd. Fire Dynamics Simulator: User’s Guide, 6th ed.; NIST—National Institute of Standards and Technology, Gaithersburg, MD, USA, 2020;
A. Stec. Fire Toxicity – The Elephant in the Room, Fire Safety Journal, 91, (2017), 79–90;
A. Stec, T. Hull, D. Purser, J. Purser. Fire Toxicity ssessment: Comparison of Asphyxiant Yields from Laboratory and Large Scale Flaming Fires, Fire Safety Science, 11, (2014), 404–418;
Updated FDS Combustion and Fuel Composition Calculators. Available online https://www.thunderheadeng. com/2015/09/updated-fds-combustion-and-fuel-composition-calculators.
