Numerical study of hydrogen/methane buoyant fires using FireFoam |
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| Affiliation: | 1. School of Civil Engineering, Hefei University of Technology, Hefei, Anhui 230009, China;2. Anhui International Joint Research Center on Hydrogen Safety, Hefei, 230009, China;3. Shanghai Fire Research Institute of MEM, 601 South Zhongshan 2nd Road, Shanghai, 200032, China;1. School of Civil Engineering, Hefei University of Technology, Hefei, Anhui 230009, PR China;2. Anhui International Joint Research Center on Hydrogen Safety, Hefei, 230009, PR China;1. Centre for Technological Risk Studies, Department of Chemical Engineering, Universitat Politècnica de Catalunya, Barcelona, Spain;2. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, China;3. Universidad de las Americas Puebla, Department of Chemical, Food and Environmental Engineering, Puebla, Mexico;1. Fire Protection Engineering, University of Maryland, College Park, MD 20742, USA;2. Clean Combustion Research Center, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia;3. Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA;4. Department of Mechanical and Nuclear Engineering, Pennsylvania State University, University Park, PA 16802, USA;5. Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269, USA;1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, PR China;2. Department of Mechanical and Aerospace Engineering, University of California at San Diego, CA 92093, USA;1. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, Jiangsu, 211816, China;2. Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control, Nanjing Tech University, Nanjing, Jiangsu, 211816, China;1. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, China;2. Research Institute of Highway, Ministry of Transport, Beijing, China;3. China Academy of Safety Science and Technology, Beijing, China |
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| Abstract: | Hydrogen/methane buoyant fires with various hydrogen volume fractions ranging from 0% to 20% were numerically studied in this paper. The modified eddy dissipation concept combustion model for multi-fuels in the large eddy simulation (LES) framework was employed for combustion, and especially the infinitely fast rate based on “global” concept was improved. Combined with the weighted sum of gray gas model for emission/absorption coefficient, the finite volume discrete ordinates model was used to compute the radiative heat transfer. The predicted centerline temperature, velocity, and flame height are in good consistence with the measured data. Furthermore, the detailed analysis was conducted on the dependency of the parameters such as centerline temperature and velocity, flame height, and soot volume fraction on hydrogen volume concentration. |
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| Keywords: | Hydrogen/methane buoyant fires Numerical simulation Improved EDC combustion Model |
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