Vented confined explosions in Stramberk experimental mine and AutoReaGas simulation |
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| Institution: | 1. University of Pardubice, Institute of Energetic Materials, Department of Theory And Technology of Explosives, Studentska 95, 532 10 Pardubice, Czech Republic;2. Research Mining Institute, Inc., Ostrava-Radvanice, Pikartska 7, 716 07 Ostrava, Czech Republic;1. CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, Anhui, PR China;2. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, Anhui, PR China;3. School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232000, Anhui, PR China;4. College of Science, North University of China, Taiyuan 030051, Shanxi, PR China;1. INSA Centre Val de Loire, Université d''Orléans, PRISME EA 4229, Bourges, France;2. Air Liquide R&D, Les Loges-en-Josas, BP 126, 78354 Jouy-en-Josas, France;1. Office of Mine Safety and Health Research, National Institute for Occupational Safety and Health, Pittsburgh, PA 15236, USA;2. Laboratory for Computational Physics and Fluid Dynamics, Naval Research Laboratory, Washington, DC 20375, USA;3. University of Maryland, College Park, MD 20742, USA;1. Defence Research and Development Organisation, Chief Construction Engineer (R&D) South, Secunderabad 500003, Telangana, India;2. Department of Civil Engineering, Indian Institute of Technology (ISM)Dhanbad, Dhanbad 826004, Jharkahand, India;3. SS Infrastructure Development Consultants Limited, London, Cheyne Terrace, 10 Fenschurch, United Kingdom;4. Department of Mechanical Aerospace and Civil Engineering, The University of Manchester, Manchester M13 9PL, United Kingdom;5. Defence Research and Development Organisation, Centre for Fire, Explosive and Environment Safety, Timarpur – 110054, New Delhi, India |
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| Abstract: | Research Mining Institute, Inc., Ostrava-Radvanice, in cooperation with Dept. of Theory And Technology of Explosives of University of Pardubice and Klokner Institute of CTU in Prague, has performed three series of experiments examining methane–air mixture explosions and their impact on 14 and 29 cm thick wall. The project was named ‘Modeling Pressure Fields Effects on Engineering Structures During Accidental Explosions of Gases in Buildings’ and was sponsored by Grant Agency of Czech Republic (project No. 103/01/0039). The project is aimed at deeper understanding of pressure field effect upon the structures. Methane-air mixture explosion was used to generate the blast wave. The geometrical configuration of the environment resembled a room of an average size, such as larger kitchen. Preliminary simulations were made by AutoReaGas code (Century Dynamics and TNO). The design phase was followed by tests in an experimental mine in Stramberk. Two masonry dams were build in the mine, with cross-section areas of 10.2 m2 and longitudinal distance of 5.7 m, creating an explosion chamber with a volume of 58 m3. Two vent openings with an adjustable free cross-section were used to control the maximum overpressure inside the chamber. The concentration of methane-air mixture was approximately 9.5% (vol.) and the volumes of the clouds were 5.25, 10.2 and 15.3 m3 respectively. The generated blast wave overpressures inside the chamber ranged between 1 and 150 kPa. According to experimental results a calibration of the code was performed. After the calibration it is possible to make relatively accurate simulations in similar geometry and to calculate the pressure loading of the structure at any spot in the simulated space. This paper describes the experiments performed and compares experimental and computational results. |
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