Subgrid scale laminar flamelet model for partially premixed combustion and its application to backdraft simulation |
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| Affiliation: | 1. Center for Public Safety Research, Tsinghua University, Beijing, 100084, PR China;2. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, PR China;3. Department of Architecture, School of Science and Engineering, Waseda University, Okubo 3-4-1, Shinjuku-ku, Tokyo, 169-8555, Japan;4. Institute of Engineering Thermophysics, Chinese Academy of Science, Beijing, 100080, PR China;1. Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China;2. Combustion & Heat Transfer Laboratory, Mitsubishi Heavy Industries, Ltd., Japan;1. Dept. of Mechanical Eng., Indian Institute of Technology Madras, Chennai 600036, India;2. Dept. of Fire Protection Eng., Worcester Polytechnic Institute, Worcester, MA 01609, USA;1. Energy Institute Hrvoje Po?ar, Savska cesta 163, Zagreb, Croatia;2. Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, R. Boskovica 32, Split, Croatia;3. Power Utility of HZ-HB, Distribution Electricity, Mile Budaka 106, Mostar, Bosnia and Herzegovina;2. Research Institute for Sustainable Urban Development, The Hong Kong Polytechnic University, Kowloon, Hong Kong;1. Department of Fire Protection Engineering, University of Maryland, College Park, MD, USA;2. Fire Protection Research Foundation, Quincy, MA, USA;3. USDA Forest Service, Missoula Fire Sciences Laboratory, Missoula, MT, USA |
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| Abstract: | Flame spread after air is suddenly introduced to a vitiated compartment in backdraft is between non-premixed and premixed flame spread under a ventilation-controlled condition. And it is necessary, but difficult to numerically simulate it. In this paper, an attempt of backdraft simulation is introduced. Numerical models including a subgrid scale laminar flamelet model and a partially premixed model are imbedded in FDS3.0 source code for backdraft simulation. Some significant fire characteristics reported in previous backdraft experiments can be seen in the numerical results. It is also indicated that these combined models can be used to predict the partially premixed combustion and fire phenomena under ventilation-controlled conditions. |
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