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Longitudinal Ventilation for Smoke Control and Evacuation in High-Temperature Tunnel Fires
- 1 Wuhan University of Technology, Wuhan, China
- 2 Southwest Jiaotong University, Chengdu, China
* Author to whom correspondence should be addressed.
Abstract
When high-temperature geothermal conditions occur within road tunnels, the safety of emergency exits becomes more challenging, especially in cases of fire. The high background temperature increases the speed of the smoke stratification process, and therefore, is unfavorable for people rescue and safety evacuation. In China, longitudinal ventilation systems are widely used to control the smoke within road tunnels during emergency fire events and help ensure safety evacuation. This paper aims to evaluate the performance of the longitudinal ventilation system when applied to a high-temperature road tunnel. The results show that the high-temperature geothermal in the tunnel will result in an accelerated stratification of the smoke layer, and the ventilation speed must be reasonably adjusted to meet the demands of smoke control. Under an optimal ventilation setting, the smoke density in the passage was reduced and the visibility was dramatically improved, which tremendously increased the evacuation efficiency. Overall, this study provides some practical suggestions for tunnels exposed to high geothermal temperatures, including the potential for variable-speed ventilation systems and localized smoke extraction strategies.
Keywords
Longitudinal ventilation, tunnel fire safety, smoke control, evacuation efficiency, high-temperature tunnels
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Cite this article
Wang,W.;Lai,M. (2025). Longitudinal Ventilation for Smoke Control and Evacuation in High-Temperature Tunnel Fires. Theoretical and Natural Science,86,20-25.
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The datasets used and/or analyzed during the current study will be available from the authors upon reasonable request.
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Volume title: Proceedings of the 4th International Conference on Computing Innovation and Applied Physics
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