Experimental Investigation on Temperature Profiles at Ceiling and Door of Subway Carriage Fire

Abstract

Previous studies usually used the common tunnel model and paid little attention to the propagation characteristics of fire in the carriage structure with multiple lateral openings. In the current study, experiments were carried out in a reduced-scale (1:5) subway carriage model to study the propagation characteristics of carriage fire. The main focuses were on the temperature contour profiles and distribution laws under the ceiling and at different doors inside the carriage. Results show that although the status of the side door of the carriage does not have a significant effect on the mass loss rate of fuel combustion, the temperature distribution under the ceiling will be affected under the effect of the smoke overflow of the door opening. The effect of door status on the longitudinal ceiling temperature is mainly on the area between the fire source and the adjacent door. For the transverse ceiling temperature above the fire source, the effect of the status of the door is significant with the increase of the fire source. Besides, the temperature contour profile at the door shows regular distribution. In the process of gradually increasing the temperature as the height increases, the isotherm gradually changes from a horizontal straight line to two inverted triangular sides, the temperature at the door has been basically in the ambient temperature from the dimensionless height (normalized by the height of the door) below 0.6. The measured radiation at the upper part of the carriage end is about 5 times higher than that in the middle of the door adjacent to the fire source, and the ratio is not significantly affected by the heat release rate. The results of this study can be of use to the fire-protection community to better understand fire dynamics.

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Abbreviations

\(H\) :

Subway carriage height (m)

\(H_{d}\) :

Door height (m)

\(L\) :

Model size (m)

\(\dot{m}^{^{\prime\prime}}\) :

Mass loss rate per unit area (g m2 s1)

\(Q\) :

Heat release rate (kW)

\(t\) :

Time

\(T\) :

Temperature (K)

\(\Delta T\) :

Temperature rise (K)

\(\Delta T_{l - difference}\) :

The longitudinal temperature differences between different door statuses

\(\Delta T_{t - difference}\) :

The transverse temperature differences between different door statuses

\(\Delta T_{lm}\) :

Maximum temperature rise at the longitudinal centerline (K)

\(\Delta T_{tm,X}\) :

Maximum transverse temperature rise at a distance of X from the fire source (K)

\(\Delta T_{max,d}\) :

Maximum temperature rise at the door (K)

\(W\) :

Subway carriage width (m)

\(X\) :

Longitudinal distance from the fire source (m)

\(Y\) :

Transverse distance from the fire source (m)

\(Z\) :

Height from the bottom of the door (m)

F :

Full scale

M :

Model scale

References

  1. 1.

    Li YZ, Ingason H (2018) Overview of research on fire safety in underground road and railway tunnels. Tunn Undergr Space Technol 81:568–589

    Article  Google Scholar 

  2. 2.

    Zhao S, Liu F, Wang F, Weng M, Zeng Z (2018) A numerical study on smoke movement in a metro tunnel with a non-axisymmetric cross-section. Tunn Undergr Space Technol 73:187–202

    Article  Google Scholar 

  3. 3.

    Zhang S, Yao Y, Zhu K, Li K, Zhang R, Lu S, Cheng X (2016) Prediction of smoke back-layering length under different longitudinal ventilations in the subway tunnel with metro train. Tunn Undergr Space Technol 53:13–21

    Article  Google Scholar 

  4. 4.

    Peng M, Shi L, He K, Yang H, Cong W, Cheng X, Richard Y (2019) Experimental study on fire plume characteristics in a subway carriage with doors. Fire Technol 56:1–23

    Google Scholar 

  5. 5.

    Gao ZH, Liu ZX, Ji J, Wan HX, Sun, JH (2016) Experimental investigation on the ceiling temperature profiles of confined strong plume impinging flow. In 8th international seminar on fire and explosion hazards

  6. 6.

    Karlsson B, Quintiere J (1999) Enclosure fire dynamics. CRC Press, Boca Raton

    Google Scholar 

  7. 7.

    Zhao S, Liu F, Wang F, Weng M (2018) Experimental studies on fire-induced temperature distribution below ceiling in a longitudinal ventilated metro tunnel. Tunn Undergr Space Technol 72:281–293

    Article  Google Scholar 

  8. 8.

    Zhang S, Cheng X, Yao Y, Zhu K, Li K, Lu S, Zhang R, Zhang H (2016) An experimental investigation on blockage effect of metro train on the smoke back-layering in subway tunnel fires. Appl Therm Eng 99:214–223

    Article  Google Scholar 

  9. 9.

    Meng N, Wang Q, Liu Z, Li X, Yang H (2017) Smoke flow temperature beneath tunnel ceiling for train fire at subway station: Reduced-scale experiments and correlations. Appl Therm Eng 115:995–1003

    Article  Google Scholar 

  10. 10.

    Delichatsios MA, Lee Y-P, Tofilo P (2009) A new correlation for gas temperature inside a burning enclosure. Fire Saf J 44:1003–1009

    Article  Google Scholar 

  11. 11.

    Tang F, Hu LH, Delichatsios MA, Lu KH, Zhu W (2012) Experimental study on flame height and temperature profile of buoyant window spill plume from an under-ventilated compartment fire. Int J Heat Mass Transf 55:93–101

    Article  Google Scholar 

  12. 12.

    Chow W (1996) Simulation of tunnel fires using a zone model. Tunn Undergr Space Technol 11:221–236

    Article  Google Scholar 

  13. 13.

    Hu LH (2006). Studies on Thermal Physics of Smoke Movement in Tunnel Fires. PH. D Thesis, University of science and Technology of China, Heifei, Anhui, China

  14. 14.

    Ingason H (2007) Model scale railcar fire tests. Fire Saf J 42:271–282

    Article  Google Scholar 

  15. 15.

    Li YZ, Ingason H, Lonnermark A (2014) Fire development in different scales of train carriages. Fire Safety Science 11:302–315

    Article  Google Scholar 

  16. 16.

    Lönnermark A, Ingason H, Li YZ, Kumm M (2017) Fire development in a 1/3 train carriage mock-up. Fire Saf J 91:432–440

    Article  Google Scholar 

  17. 17.

    Ng YW, Chow WK, Cheng CH, Chow CL (2019) Scale modeling study on flame colour in a ventilation-limited train car pool fire. Tunn Undergr Space Technol 85:375–391

    Article  Google Scholar 

  18. 18.

    Peng M, Cheng X, He K, Cong W, Shi L, Yuen R (2020) Experimental study on ceiling smoke temperature distributions in near field of pool fires in the subway train. J Wind Eng Ind Aerodyn 199:104135

    Article  Google Scholar 

  19. 19.

    Carvel R, Beard A (2005) The Handbook of Tunnel Fire Safety. Thomas Telford, London

    Google Scholar 

  20. 20.

    Yao Y, Cheng X, Shi L, Zhang S, He K, Peng M, Zhang H (2018) Experimental study on the effects of initial sealing time on fire behaviors in channel fires. Int J Therm Sci 125:273–282

    Article  Google Scholar 

  21. 21.

    Shafee S, Yozgatligil A (2018) An analysis of tunnel fire characteristics under the effects of vehicular blockage and tunnel inclination. Tunn Undergr Space Technol 79:274–285

    Article  Google Scholar 

  22. 22.

    Fan CG, Ji J, Li YZ, Ingason H, Sun JH (2017) Experimental study of sidewall effect on flame characteristics of heptane pool fires with different aspect ratios and orientations in a channel. Proc Combust Inst 36:3121–3129

    Article  Google Scholar 

  23. 23.

    Chen C-k, Zhu C-x, Liu X-y, Kang H, Zeng J-w, Yang J (2016) The effect of fuel area size on behavior of fires in a reduced-scale single-track railway tunnel. Tunn Undergr Space Technol 16(52):127–137

    Article  Google Scholar 

  24. 24.

    Chen C-k, Xiao H, Wang N-n, Shi C-l, Zhu C-x, Liu X-y (2017) Experimental investigation of pool fire behavior to different tunnel-end ventilation opening areas by sealing. Tunn Undergr Space Technol 63:106–117

    Article  Google Scholar 

  25. 25.

    Chen C-k, Zhu C-x, Liu X-y, Yu N-h (2016) Experimental investigation on the effect of asymmetrical sealing on tunnel fire behavior. Int J Heat Mass Transf 92:55–65

    Article  Google Scholar 

  26. 26.

    Ji J, Fu YY, Fan CG, Gao ZH, Li KY (2015) An experimental investigation on thermal characteristics of sidewall fires in corridor-like structures with varying width. Int J Heat Mass Transf 84:562–570

    Article  Google Scholar 

  27. 27.

    Ji J, Bi Y, Venkatasubbaiah K, Li K (2016) Influence of aspect ratio of tunnel on smoke temperature distribution under ceiling in near field of fire source. Appl Therm Eng 106:1094–1102

    Article  Google Scholar 

Download references

Acknowledgements

This work was supported by National Natural Science Foundation of China (No.51776192), Youth Innovation Promotion Association CAS (No. CX2320007001), Fundamental Research Funds for the Central Universities (No. WK2320000048), and the Research Grant Council of the Hong Kong Special Administrative Region, China (contract Grant Number CityU 11301015). We sincerely appreciate these supports.

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Correspondence to Xudong Cheng.

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Peng, M., Cheng, X., Cong, W. et al. Experimental Investigation on Temperature Profiles at Ceiling and Door of Subway Carriage Fire. Fire Technol 57, 439–459 (2021). https://doi.org/10.1007/s10694-020-01010-z

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Keywords

  • Temperature decay profile
  • Isotherm contour
  • Door status
  • Radiant heat flux
  • Carriage fire
  • Subway tunnel