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Mathematical Problems in Engineering
Volume 2014 (2014), Article ID 707423, 6 pages
http://dx.doi.org/10.1155/2014/707423
Research Article

Methods for Prediction of Temperature Distribution in Flashover Caused by Backdraft Fire

1School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
2Jiangsu Key Laboratory for Environmental Impact and Structural Safety in Civil Engineering, Xuzhou 221116, China
3Institute of Industry Technology, Guangzhou and Chinese Academy of Sciences, Guangzhou 510000, China

Received 29 December 2013; Accepted 22 May 2014; Published 4 June 2014

Academic Editor: Mohamed A. Seddeek

Copyright © 2014 Guowei Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Accurately predicting temperature distribution in flashover fire is a key issue for evacuation and fire-fighting. Now many good flashover fire experiments have be conducted, but most of these experiments are proceeded in enclosure with fixed openings; researches on fire development and temperature distribution in flashover caused by backdraft fire did not receive enough attention. In order to study flashover phenomenon caused by backdraft fire, a full-scale fire experiment was conducted in one abandoned office building. Process of fire development and temperature distribution in room and corridor were separately recorded during the experiment. The experiment shows that fire development in enclosure is closely affected by the room ventilation. Unlike existing temperature curves which have only one temperature peak, temperature in flashover caused by backdraft may have more than one peak value and that there is a linear relationship between maximum peak temperature and distance away from fire compartment. Based on BFD curve and experimental data, mathematical models are proposed to predict temperature curve in flashover fire caused by backdraft at last. These conclusions and experiment data obtained in this paper could provide valuable reference to fire simulation, hazard assessment, and fire protection design.