The Numerical Study of Fire Thermal Radiation Hazard in Inclined Tunnel Engineering Safety

DOI

10.2991/978-94-6463-556-0_12How to use a DOI?

Keywords

inclined tunnel fire; thermal radiation hazard; backward ray tracing method; numerical simulation; engineering safety

Abstract

The slope of the tunnel has an impact on the distribution of smoke and droplets, which subsequently affects the extent of thermal radiation damage experienced by individuals in the tunnel. Numerical simulation was employed to replicate the progression of fires in inclined tunnels. Using this simulation method, the temperature field, gas radiation properties, and droplet distribution within the tunnel fire were determined. A discrete human mesh was then positioned within the fire field, and the radiant heat flux on its surface was calculated using the backward ray tracing method. The intensity and distribution of radiant heat flux on the human surface, in the direction of the upwind and downwind outlets of the fire source, were simulated at different stages of fire development. By analyzing the changes in radiant heat flux and numerical values, the hazards of thermal radiation to human beings at different stages of fire development and various locations were summarized. The findings of this study indicate that in tunnel fires, during the intermediate stage of fire development when the air heat flow is established and the smoke concentration is not at its maximum, individuals in the downwind direction are at the highest risk of thermal radiation injuries. However, when the smoke concentration reaches a sufficient level, the damage caused by thermal radiation to the human body is significantly reduced.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Zheng Wei
AU  - Feiyang Huang
AU  - Peizhong Yang
PY  - 2024
DA  - 2024/10/29
TI  - The Numerical Study of Fire Thermal Radiation Hazard in Inclined Tunnel Engineering Safety
BT  - Proceedings of the 2024 6th International Conference on Structural Seismic and Civil Engineering Research (ICSSCER 2024)
PB  - Atlantis Press
SP  - 99
EP  - 108
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-556-0_12
DO  - 10.2991/978-94-6463-556-0_12
ID  - Wei2024
ER  -