Full-scale experimental studies for backdraft using solid materials |
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| Authors: | LC Tsai CW Chiu |
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| Institution: | 1. National Yunlin University of Science and Technology, Douliou, Taiwan, ROC;2. National Taiwan Police College, Taipei, Taiwan, ROC;1. Institut de Radioprotection et de Sûreté Nucléaire (IRSN), BP3, 13115 Saint Paul-Lez-Durance Cedex, France;2. Institut PPRIME, UPR 3346 du CNRS, Université de Poitiers, ENSMA, 1 rue Clément Ader, 86961 Futuroscope, Poitiers, France;3. Electricité de France (EDF R&D), 6 Quai Wattier BP 49, 78401 Chatou Cedex, France;1. Nuclear Engineering Department, Technical University of Madrid, José Gutiérrez Abascal 2, 28006 Madrid, Spain;2. Modeling and Simulation Department, Nuclear Safety Council (MOSI CSN), Justo Dorado 11, 28040 Madrid, Spain;1. Institut P'', CNRS, ENSMA, Université de Poitiers, 1 Av. Clément Ader, Téléport 2, BP 40109, 86961 Futuroscope Chasseneuil, France;2. Commissariat à l''Energie Atomique, DEN/DANS/DM2S/SFME/LTMF, CEA de Saclay, 91191 Gif-sur-Yvette Cedex, France;3. Commissariat à l''Energie Atomique, CEA/PMR/DPSN, CEA de Fontenay-aux-Roses, BP 6, 92265 Fontenay-aux-Roses Cedex, France;4. AREVA NC, 33 Rue la Fayette, 75442 Paris Cedex 09, France;1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, Anhui, China;2. Mechanical Engineering, University of Texas at Austin, Austin, TX 78712, USA |
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| Abstract: | The backdraft experiments involved three full-scale room fire tests that used solid furnishing, loveseats. From experimental data, a backdraft caused two temperature peaks. The first one was below 600 °C. Then, an abrupt opening of the front door led to a supply of a large amount of fresh air, followed by an indication of sudden temperature rise. The second peak temperature was over 600 °C. Meanwhile, the deflagration resulted in the gases heating and expanding within the fire space, thus forcing unburned gases out of the vent ahead of the flame front. Comparing both cases with natural gas and solid loveseat as the fuel in backdraft, the former can achieve pre-mixture state and readily create an instant explosion wave phenomenon; however, this wave disappeared immediately. On the other hand, the solid loveseat used as the fuel in this study produced backdraft within 30–50 s after opening of the door. After the occurrence of backdraft, fire maintained a period of fully developed stage, which was consistent with the conditions in actual fires. |
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