Modeling of detonation processes in chemically active bubble systems at normal and elevated initial pressures |
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| Institution: | 1. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Ministry of Education, Tianjin University, Tianjin 300072, PR China;2. Department of Energy and Power Engineering, School of Mechanical Engineering, Tianjin University, Tianjin 300072, PR China;3. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, PR China;1. Marine Research (MA-RE) Institute, Department of Biological Sciences, University of Cape Town, Private Bag X3, Rhodes Gift, 7701, Western Cape, South Africa;3. Department of Environmental Sciences, University of South Africa, Florida, 1709, Gauteng, South Africa;4. South Atlantic Environmental Research Institute (SAERI), Stanley, FIQQ 1ZZ, Falkland Islands;5. Department of Biodiversity and Conservation Biology, University of the Western Cape, Cape Town, 7535, Western Cape, South Africa;1. School of Safety Science and Emergency Management, Wuhan University of Technology, Wuhan, Hubei, 430070, China;2. Operation and Monitoring Centre for Hefei Urban Safety & Security, Hefei Institute for Public Safety Research, Tsinghua University, Hefei, Anhui, 230601, China;3. China University of Petroleum, Beijing, 102249, China;1. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang Province, PR China;2. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong Province, PR China |
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| Abstract: | The detonation processes in chemically active bubble liquids under elevated initial pressures are investigated theoretically. It is shown, that supersonic regimes of wave propagation can exist, if the initial pressure is relatively high and the volume fraction of the bubbles is relatively small. Characteristic values of the bubble detonation wave pressure at sub- and supersonic regimes differ by an order of magnitude.The principal possibility of detonation wave structure transformation in the case of propagation in the mixture with high initial pressure and longitudinal gradient of bubble volume fraction is predicted. The leading shock may transform into a smooth wave of compression.The Chapman-Jouguet conditions for self-sustaining supersonic bubble detonation wave is obtained.A model of shock induced single bubble dynamics and ignition taking into account the real properties of the liquid, inter-phase transition processes, mechanical mixing of phases, ignition delay and continuous shift of chemical equilibrium have been described. Calculations for the oxygen containing bubble in liquid cyclohexane have been performed. |
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