Stratified Propane–Air Explosions in a Duct Vented Geometry: Effect of Concentration,Ignition and Injection Position |
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| Institution: | 1. Energy and Resources Research Institute, University of Leeds, Leeds, UK;2. University of Naples Federico II, Naples, Italy;1. School of Chemical Machinery and Safety Engineering, Dalian University of Technology, Dalian, Liaoning 116024, PR China;2. School of Resources & Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, PR China;1. School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;2. China Academy of Safety Science and Technology, Beijing 100012, China;3. Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining and Technology (Beijing), Beijing 100083, China;4. Key Laboratory of Major Hazard and Chemical Industry Park System Safety, Ministry of Emergency Management of China, Beijing 100012, China;1. School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454003, China;2. School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China;3. School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China;1. School of Emergency Management and Safety Engineering, China University of Mining & Technology, Beijing, 100083, China;2. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081, China;3. Institute for Public Safety Research, Tsinghua University, Beijing, 100084, China;4. School of Safety Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China |
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| Abstract: | Duct vented geometries are a common feature in modern industrial installations where a vessel is protected from internal explosion pressures, and where the explosion products need to be directed away from sensitive areas. In this research, stratified propane–air concentrations have been investigated using a vented vessel connected to a vent pipe. Concentration, injection position and ignition position were varied and comparisons made with homogeneous tests at the same ‘global concentration’ for each condition. The maximum pressures produced by the worst case stratified mixture were only about a quarter of the maximum produced by the worst case homogeneous mixtures. However, for lean concentrations, stratified mixtures were shown to produce consistently greater pressures than the equivalent homogeneous case, irrespective of ignition position. In addition, results are presented which demonstrate that end ignition appears to be more severe than central ignition, contrary to what is reported in literature. |
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