The critical location for thermal radiation disaster in personnel evacuation of rack railway tunnel fires under the large longitudinal slope
Thermal radiation has a great effect on personnel evacuation when the train is on fire in the rack railway tunnels. However, the influence of the longitudinal slope, especially the large longitudinal slope, is not clear. The critical location of a disaster caused by thermal radiation is proposed. Ba...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X2300103X |
| _version_ | 1811166377460891648 |
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| author | Pai Xu Daiqiang Zhu Zhong Li Liangjie Zhou Shuping Jiang Linjie Li |
| author_facet | Pai Xu Daiqiang Zhu Zhong Li Liangjie Zhou Shuping Jiang Linjie Li |
| author_sort | Pai Xu |
| collection | DOAJ |
| description | Thermal radiation has a great effect on personnel evacuation when the train is on fire in the rack railway tunnels. However, the influence of the longitudinal slope, especially the large longitudinal slope, is not clear. The critical location of a disaster caused by thermal radiation is proposed. Based on the FDS, the correction models of maximum temperature rise and longitudinal temperature decay of rack railway tunnel with slope are obtained for random evacuation mode and fixed-point evacuation mode. And the theoretical model for the critical location is established. The results show that the maximum temperature rise and the longitudinal temperature attenuation are related to the cubic and quadratic equations of the longitudinal slope, respectively. A decreasing effect is observed in the maximum temperature rise of the rail railway tunnel with a large longitudinal slope, and the degree of longitudinal attenuation is extremely small. In this case, the thermal radiation under the random evacuation mode is less risky than that under fixed-point evacuation mode, which is more conducive to evacuation. The accuracy of the theoretical model is high, and the maximum error is 21.4%. The results can support emergency works, such as rescue engineering design and personnel evacuation induction. |
| first_indexed | 2024-04-10T15:51:18Z |
| format | Article |
| id | doaj.art-062f0979a9774b8fb539f47b80088ea7 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-04-10T15:51:18Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-062f0979a9774b8fb539f47b80088ea72023-02-11T04:15:38ZengElsevierCase Studies in Thermal Engineering2214-157X2023-03-0143102797The critical location for thermal radiation disaster in personnel evacuation of rack railway tunnel fires under the large longitudinal slopePai Xu0Daiqiang Zhu1Zhong Li2Liangjie Zhou3Shuping Jiang4Linjie Li5State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; School of Civil Engineering, Chongqing Jiaotong University, Chongqing, 400074, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; School of Civil Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; Corresponding author. Chongqing Jiaotong University, No. 66 Xuefu Rd., Nan'an Dist., Chongqing, 400074, China.State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; School of Civil Engineering, Chongqing Jiaotong University, Chongqing, 400074, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; School of Civil Engineering, Chongqing Jiaotong University, Chongqing, 400074, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; School of Civil Engineering, Chongqing Jiaotong University, Chongqing, 400074, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; School of Civil Engineering, Chongqing Jiaotong University, Chongqing, 400074, ChinaThermal radiation has a great effect on personnel evacuation when the train is on fire in the rack railway tunnels. However, the influence of the longitudinal slope, especially the large longitudinal slope, is not clear. The critical location of a disaster caused by thermal radiation is proposed. Based on the FDS, the correction models of maximum temperature rise and longitudinal temperature decay of rack railway tunnel with slope are obtained for random evacuation mode and fixed-point evacuation mode. And the theoretical model for the critical location is established. The results show that the maximum temperature rise and the longitudinal temperature attenuation are related to the cubic and quadratic equations of the longitudinal slope, respectively. A decreasing effect is observed in the maximum temperature rise of the rail railway tunnel with a large longitudinal slope, and the degree of longitudinal attenuation is extremely small. In this case, the thermal radiation under the random evacuation mode is less risky than that under fixed-point evacuation mode, which is more conducive to evacuation. The accuracy of the theoretical model is high, and the maximum error is 21.4%. The results can support emergency works, such as rescue engineering design and personnel evacuation induction.http://www.sciencedirect.com/science/article/pii/S2214157X2300103XRack railway tunnelTunnel firesLarge longitudinal slopeThermal radiationCritical locationPersonnel evacuation |
| spellingShingle | Pai Xu Daiqiang Zhu Zhong Li Liangjie Zhou Shuping Jiang Linjie Li The critical location for thermal radiation disaster in personnel evacuation of rack railway tunnel fires under the large longitudinal slope Case Studies in Thermal Engineering Rack railway tunnel Tunnel fires Large longitudinal slope Thermal radiation Critical location Personnel evacuation |
| title | The critical location for thermal radiation disaster in personnel evacuation of rack railway tunnel fires under the large longitudinal slope |
| title_full | The critical location for thermal radiation disaster in personnel evacuation of rack railway tunnel fires under the large longitudinal slope |
| title_fullStr | The critical location for thermal radiation disaster in personnel evacuation of rack railway tunnel fires under the large longitudinal slope |
| title_full_unstemmed | The critical location for thermal radiation disaster in personnel evacuation of rack railway tunnel fires under the large longitudinal slope |
| title_short | The critical location for thermal radiation disaster in personnel evacuation of rack railway tunnel fires under the large longitudinal slope |
| title_sort | critical location for thermal radiation disaster in personnel evacuation of rack railway tunnel fires under the large longitudinal slope |
| topic | Rack railway tunnel Tunnel fires Large longitudinal slope Thermal radiation Critical location Personnel evacuation |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X2300103X |
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