Study of the smoke toxicity characteristics in an inclined tunnel
(2024) In Fire Safety Journal 142.- Abstract
Fire smoke is one of the most important factors causing casualties, but also has the potential to bring some harm to the surrounding environment. In this work, the longitudinal temperature profile and the pollutant toxicity of a ceiling jet induced by a wall-attached fire with different tunnel slopes, were numerically and experimentally investigated by using a 1:8 reduced-scale inclined tunnel. The results show that for a given heat release rate (HRR), the flame extension is longer and the temperature decay is slower in ceiling jets induced by a wall-attached fire than for similar free-burning fires, because the air entrainment is restricted by the tunnel side walls. Further, the uphill pollutant toxicity was found to be higher with... (More)
Fire smoke is one of the most important factors causing casualties, but also has the potential to bring some harm to the surrounding environment. In this work, the longitudinal temperature profile and the pollutant toxicity of a ceiling jet induced by a wall-attached fire with different tunnel slopes, were numerically and experimentally investigated by using a 1:8 reduced-scale inclined tunnel. The results show that for a given heat release rate (HRR), the flame extension is longer and the temperature decay is slower in ceiling jets induced by a wall-attached fire than for similar free-burning fires, because the air entrainment is restricted by the tunnel side walls. Further, the uphill pollutant toxicity was found to be higher with greater HRR and lower tunnel slope. Finally, a correlation between the non-dimensional longitudinal smoke temperature and CO concentration could be established for the inclined tunnel fire.
(Less)
- author
- Tang, Fei ; Mcnamee, Margaret LU ; Xu, Tong ; Zhang, Xiaolei ; Deng, Lei LU and Hu, Longhua
- organization
- publishing date
- 2024
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Burner aspect ratio, CO concentration, Inclined tunnel fire, Smoke toxicity, Temperature profile, Wall-attached fire
- in
- Fire Safety Journal
- volume
- 142
- article number
- 104021
- publisher
- Elsevier
- external identifiers
-
- scopus:85174331465
- ISSN
- 0379-7112
- DOI
- 10.1016/j.firesaf.2023.104021
- language
- English
- LU publication?
- yes
- id
- 0b39d869-6ebb-488d-9f6a-28bca2611f0f
- date added to LUP
- 2024-02-01 15:14:05
- date last changed
- 2024-02-01 15:15:11
@article{0b39d869-6ebb-488d-9f6a-28bca2611f0f,
abstract = {{<p>Fire smoke is one of the most important factors causing casualties, but also has the potential to bring some harm to the surrounding environment. In this work, the longitudinal temperature profile and the pollutant toxicity of a ceiling jet induced by a wall-attached fire with different tunnel slopes, were numerically and experimentally investigated by using a 1:8 reduced-scale inclined tunnel. The results show that for a given heat release rate (HRR), the flame extension is longer and the temperature decay is slower in ceiling jets induced by a wall-attached fire than for similar free-burning fires, because the air entrainment is restricted by the tunnel side walls. Further, the uphill pollutant toxicity was found to be higher with greater HRR and lower tunnel slope. Finally, a correlation between the non-dimensional longitudinal smoke temperature and CO concentration could be established for the inclined tunnel fire.</p>}},
author = {{Tang, Fei and Mcnamee, Margaret and Xu, Tong and Zhang, Xiaolei and Deng, Lei and Hu, Longhua}},
issn = {{0379-7112}},
keywords = {{Burner aspect ratio; CO concentration; Inclined tunnel fire; Smoke toxicity; Temperature profile; Wall-attached fire}},
language = {{eng}},
publisher = {{Elsevier}},
series = {{Fire Safety Journal}},
title = {{Study of the smoke toxicity characteristics in an inclined tunnel}},
url = {{http://dx.doi.org/10.1016/j.firesaf.2023.104021}},
doi = {{10.1016/j.firesaf.2023.104021}},
volume = {{142}},
year = {{2024}},
}