A study of the critical velocity and the confinement velocity of fire accident in a longitudinally ventilated underground train with different door opening scenarios
Journal article
Su, J., Li, Y., Feng, S., Zhong, H., Li, J., Liu. W., Chen, C. and Li, J. (2022). A study of the critical velocity and the confinement velocity of fire accident in a longitudinally ventilated underground train with different door opening scenarios. Tunnelling and Underground Space Technology. 131, p. 104776. https://doi.org/10.1016/j.tust.2022.104776
| Authors | Su, J., Li, Y., Feng, S., Zhong, H., Li, J., Liu. W., Chen, C. and Li, J. |
|---|---|
| Abstract | The critical velocity, confinement velocity and smoke back-layering length are significant factors for smoke control in a tunnel fire. This research aims to analysis the correlation of these 3 key smoke control parameters in the different door opening scenarios during a fire in the metro train carriage that stopped in the tunnel. Scaled model experiment measurement and numerical simulations were carried out for the propagation and control of smoke. Five fire locations in the train and two side doors opening scenarios of the train were considered. Results show that smoke back-layering length in the train can be barely influenced by the activation time of the longitudinal ventilation system. However, the opening of side doors could result in a shorter smoke back-layering |
| Keywords | Fire Underground tunnel Critical velocity Confinement velocity Door opening scenarios |
| Year | 2022 |
| Journal | Tunnelling and Underground Space Technology |
| Journal citation | 131, p. 104776 |
| Publisher | Elsevier |
| ISSN | 0886-7798 |
| Digital Object Identifier (DOI) | https://doi.org/10.1016/j.tust.2022.104776 |
| Web address (URL) | https://www.sciencedirect.com/science/article/pii/S0886779822004163?via%3Dihub |
| Publication dates | |
| Online | 18 Oct 2022 |
| Publication process dates | |
| Accepted | 26 Sep 2022 |
| Deposited | 19 Aug 2024 |
| Accepted author manuscript | License File Access Level Open |
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