主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
Fire Science and Technology

Fire Science and Technology ›› 2020, Vol. 39 ›› Issue (11): 1486-1489.

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Research on the phenomenon of backdraft based on experiment and FDS

YAO Bin1,2,3,4, ZHU Guo-qing1,2,3,4, ZHU Hui5,LI Ming-xuan5, GUO Wan-hai1,2,3,4   

  1. 1. Jiangsu Key Laboratory of Fire Safety in Urban Underground Space, Jiangsu Xuzhou 221116, China；2. Institute of Public Safety and Fire Protection, China University of Mining and Technology, Jiangsu Xuzhou 221116, China；3. Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, Jiangsu Xuzhou 221116, China ；4. Faculty of Safety Engineering, China University of Mining and Technology, Jiangsu Xuzhou 221116, China；5. Sichuan Fire Science and Technology Research Institute of MEM, Sichuan Chengdu 610035, China

  • Online:2020-11-15 Published:2020-11-15

Abstract:

The fire backdraft phenomenon of a full- size chamber using wood as fuel was studied, showing the backdraft phenomenon in a real scene and analyzing the backdraft delay time and indoor temperature changes. FDS was used to simulate the experiment. The simulation results show that the flame shape and indoor temperature change trend of the spray opening when backdraft occurs are basically the same as the actual experiment.On this basis, FDS was used to study the effect of different opening times on backdraft in the closed chamber with large opening and small opening.

Key words: backdraft, delay time, temperature change, opening time, FDS simulation