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An Experimental Investigation of the External Wind Effects on the Ceiling Temperature Distribution of Fire-Induced Thermal Flow in a Corridor Connected to a Compartment

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  • Bei Cao

    (State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China)

  • Xiaodong Zhou

    (State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China)

  • Yubiao Huang

    (State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China)

  • Yuan Zheng

    (State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China)

  • Kai Ye

    (State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China)

  • Hong Liu

    (State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China)

  • Lizhong Yang

    (State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China)

Abstract

Fire-induced thermal flow is the greatest threat to trapped people and the heat-resistant quality of building structures. This paper presents an experimental investigation of the effects of external wind on the ceiling temperature distribution of fire-induced thermal flow in a one-sixth scale corridor connected to a compartment. In the experiments, the fire source was placed in the compartment with hot thermal flow spilled into the connected corridor. The heat release rate (HRR) was changed from 10 to 20 kW and the external wind velocity was changed from 0 to 2.09 m/s. The ends of the corridor could be adjusted to be fully or partially open to the environment with dam-boards arranged at the ends of the corridor. An effective corridor HRR, Q corridor , was defined to account for the amount of the spilled plume into the corridor. Results show that the temperature under the ceiling changed in a non-monotonic way with wind velocity: it first increased and then decreased with wind velocity. It was revealed that the dam-boards at the corridor opening had an evidently shielding effect, leading to higher temperature compared to the fully open environment. Finally, uniform correlations are proposed for predicting the attenuation law of ceiling temperature profiles in corridors for different wind conditions.

Suggested Citation

  • Bei Cao & Xiaodong Zhou & Yubiao Huang & Yuan Zheng & Kai Ye & Hong Liu & Lizhong Yang, 2020. "An Experimental Investigation of the External Wind Effects on the Ceiling Temperature Distribution of Fire-Induced Thermal Flow in a Corridor Connected to a Compartment," Energies, MDPI, vol. 13(7), pages 1-18, April.
  • Handle: RePEc:gam:jeners:v:13:y:2020:i:7:p:1826-:d:343578
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    References listed on IDEAS

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    1. Gao, Zihe & Wan, Huaxian & Ji, Jie & Bi, Yubo, 2019. "Experimental prediction on the performance and propagation of ceiling jets under the influence of wall confinement," Energy, Elsevier, vol. 178(C), pages 378-385.
    2. Kai Ye & Xiaodong Zhou & Lizhong Yang & Xiao Tang & Yuan Zheng & Bei Cao & Yang Peng & Hong Liu & Yong Ni, 2019. "A Multi-Scale Analysis of the Fire Problems in an Urban Utility Tunnel," Energies, MDPI, vol. 12(10), pages 1-20, May.
    3. Jae-Chan Park & In-Ho Kim & Hyung-Jo Jung, 2019. "Feasibility Study of Fluctuating Wind Pressure around High-Rise Buildings as a Potential Energy-Harvesting Source," Energies, MDPI, vol. 12(21), pages 1-31, October.
    4. Peng Zhao & Zhongyuan Yuan & Yanping Yuan & Nanyang Yu & Tao Yu, 2019. "A Study on Ceiling Temperature Distribution and Critical Exhaust Volumetric Flow Rate in a Long-Distance Subway Tunnel Fire with a Two-Point Extraction Ventilation System," Energies, MDPI, vol. 12(8), pages 1-18, April.
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