Comparative Study of Longitudinal Temperature Decay of Weak and Strong Plumes with Different Tunnel Aspect Ratios
Numerical investigations were performed to compare and analyze the effect of the tunnel aspect ratio on the temperature distribution caused by weak and strong plumes. Four tunnel aspect ratios were chosen, which were one, two, four, and eight, respectively. The heat release rates were manipulated wi...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-11-01
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| Series: | Fire |
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| Online Access: | https://www.mdpi.com/2571-6255/7/12/431 |
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| author | Zhisheng Li Xin Liu Yanying Cheng Gang Li Dong Xu Wei Hou Rui Zheng Baiyi Li |
| author_facet | Zhisheng Li Xin Liu Yanying Cheng Gang Li Dong Xu Wei Hou Rui Zheng Baiyi Li |
| author_sort | Zhisheng Li |
| collection | DOAJ |
| description | Numerical investigations were performed to compare and analyze the effect of the tunnel aspect ratio on the temperature distribution caused by weak and strong plumes. Four tunnel aspect ratios were chosen, which were one, two, four, and eight, respectively. The heat release rates were manipulated within the range of 3 MW to 50 MW in order to replicate fire situations involving small cars, trucks, and big freight vehicles. The study revealed that the aspect ratio of the tunnel has minimal impact on the temperature distribution in the vicinity of the fire area, but it significantly affects the temperature distribution in the distant area from the fire source. The temperature gradient of the fire source at a distance exhibits a non-monotonic tendency in the far-field. The temperature distribution gradient decreases more significantly when driven by a strong plume compared to a weak plume. A quantified investigation of the maximum excess temperature was conducted by including a specific diameter for the fire source. Subsequent correlations of the longitudinal temperature distribution were established for both weak and strong plumes. |
| format | Article |
| id | doaj-art-6c4e7c6d32124ea1866034bdea8f0d2d |
| institution | OA Journals |
| issn | 2571-6255 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fire |
| spelling | doaj-art-6c4e7c6d32124ea1866034bdea8f0d2d2025-08-20T02:00:38ZengMDPI AGFire2571-62552024-11-0171243110.3390/fire7120431Comparative Study of Longitudinal Temperature Decay of Weak and Strong Plumes with Different Tunnel Aspect RatiosZhisheng Li0Xin Liu1Yanying Cheng2Gang Li3Dong Xu4Wei Hou5Rui Zheng6Baiyi Li7School of Mining and Geomatics Engineering, Hebei University of Engineering, Handan 056038, ChinaSchool of Mining and Geomatics Engineering, Hebei University of Engineering, Handan 056038, ChinaChengdu Fire Protection and Rescue Research Center, Chengdu 610405, ChinaState Key Laboratory of Safety and Health for Metal Mine, Maanshan 243000, ChinaSchool of Mining and Geomatics Engineering, Hebei University of Engineering, Handan 056038, ChinaSchool of Mining and Geomatics Engineering, Hebei University of Engineering, Handan 056038, ChinaSchool of Mining and Geomatics Engineering, Hebei University of Engineering, Handan 056038, ChinaChengdu Fire Protection and Rescue Research Center, Chengdu 610405, ChinaNumerical investigations were performed to compare and analyze the effect of the tunnel aspect ratio on the temperature distribution caused by weak and strong plumes. Four tunnel aspect ratios were chosen, which were one, two, four, and eight, respectively. The heat release rates were manipulated within the range of 3 MW to 50 MW in order to replicate fire situations involving small cars, trucks, and big freight vehicles. The study revealed that the aspect ratio of the tunnel has minimal impact on the temperature distribution in the vicinity of the fire area, but it significantly affects the temperature distribution in the distant area from the fire source. The temperature gradient of the fire source at a distance exhibits a non-monotonic tendency in the far-field. The temperature distribution gradient decreases more significantly when driven by a strong plume compared to a weak plume. A quantified investigation of the maximum excess temperature was conducted by including a specific diameter for the fire source. Subsequent correlations of the longitudinal temperature distribution were established for both weak and strong plumes.https://www.mdpi.com/2571-6255/7/12/431tunnel aspect ratiothe maximum excess temperaturelongitudinal temperature distributionweak plumestrong plume |
| spellingShingle | Zhisheng Li Xin Liu Yanying Cheng Gang Li Dong Xu Wei Hou Rui Zheng Baiyi Li Comparative Study of Longitudinal Temperature Decay of Weak and Strong Plumes with Different Tunnel Aspect Ratios Fire tunnel aspect ratio the maximum excess temperature longitudinal temperature distribution weak plume strong plume |
| title | Comparative Study of Longitudinal Temperature Decay of Weak and Strong Plumes with Different Tunnel Aspect Ratios |
| title_full | Comparative Study of Longitudinal Temperature Decay of Weak and Strong Plumes with Different Tunnel Aspect Ratios |
| title_fullStr | Comparative Study of Longitudinal Temperature Decay of Weak and Strong Plumes with Different Tunnel Aspect Ratios |
| title_full_unstemmed | Comparative Study of Longitudinal Temperature Decay of Weak and Strong Plumes with Different Tunnel Aspect Ratios |
| title_short | Comparative Study of Longitudinal Temperature Decay of Weak and Strong Plumes with Different Tunnel Aspect Ratios |
| title_sort | comparative study of longitudinal temperature decay of weak and strong plumes with different tunnel aspect ratios |
| topic | tunnel aspect ratio the maximum excess temperature longitudinal temperature distribution weak plume strong plume |
| url | https://www.mdpi.com/2571-6255/7/12/431 |
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