Effect of cross section and ventilation on heat release rates in tunnel fires |
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| Affiliation: | 1. SP Technical Research Institute of Sweden, Fire Research, Sweden;2. School of Transportation Engineering, Hefei University of Technology, China;3. State Key Laboratory of Fire Science, University of Science and Technology of China, China;1. Institute of Disaster Prevention Science & Safety Technology, Central South University, Changsha 410075, China;2. Beijing Key Laboratory of Metro Fire and Passenger Transportation Safety, China Academy of Safety Science and Technology, Beijing 100012, China;3. Key Laboratory of Building Fire Protection Engineering and Technology of MPS, Tianjin 300381, China;1. State Key Laboratory of Fire Science, University of Science and Technology of China, JinZhai Road 96, Hefei, Anhui 230026, China;2. Institute of Advanced Technology, University of Science and Technology of China, Hefei, Anhui 230088, China;3. Université Lille Nord de France, ENSCL, UMET/ISP R2Fire, Cité Scientifique-Bât C7-BP 90108, 59652, Villeneuve, d''Ascq Cedex, France;1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, PR China;2. Faculty of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, Guangdong 510006, China;3. Department of Civil Engineering, Aalto University, 02150 Espoo, Finland |
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| Abstract: | Model scale fire tests were performed in tunnels with varying tunnel widths and heights in order to study the effect of tunnel cross-section and ventilation velocity on the heat release rate (HRR) for both liquid pool fires and solid fuel fires. The results showed that for well ventilated heptane pool fires, the tunnel width nearly has no influence on the HRR whilst a lower tunnel height clearly increases the HRR. For well ventilated solid fuel fires, the HRR increases by approximately 25% relative to a free burn test but the HRR is not sensitive to either tunnel width, tunnel height or ventilation velocity. For solid fuel fires that were not well ventilated, the HRRs could be less than those in free burn laboratory tests. In the case of ventilation controlled fires the HRRs approximately lie at the same level as for cases with natural ventilation. |
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| Keywords: | Tunnel fire Heat release rate Cross section Ventilation |
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