Minimum ignition energy theoretical model for flammable gas based on flame propagation layer by layer |
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| Institution: | 1. State Key Laboratory of Explosion Science and Technology, School of Mechatronic Engineering, Beijing Institute of Technology, Beijing, 100081, China;2. Beijing Institute of Technology Chongqing Innovation Center, Chongqing, 401120, China;3. Explosion Protection and Emergency Disposal Technology Engineering Research Center of the Ministry of Education, Beijing, 100081, China;4. School of Safety Science & Engineering, Xi''an University of Science and Technology, 58, Yanta Mid. Rd., Xi''an, 710054, Shaanxi, China;1. CAIMI Centro de Aplicaciones Informáticas y Modelado en Ingeniería, Universidad Tecnológica Nacional, Facultad Regional Rosario, Zeballos, 1346, S2000BQA, Rosario, Argentina;2. CONICET Consejo Nacional de Investigaciones Científicas y Técnicas, Blvd. 27 de Febrero 210 Bis, S2000EZP, Rosario, Argentina;1. Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, People''s Republic of China;2. Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics, Guangzhou, 510650, People''s Republic of China;3. CAS Engineering Laboratory for Special Fine Chemicals, Guangzhou, 510650, People''s Republic of China;4. CASH GCC Shaoguan Research Institute of Advanced Materials, Nanxiong, 512400, People''s Republic of China;5. University of the Chinese Academy of Sciences, Beijing, 100049, People''s Republic of China;6. Incubator of Nanxiong CAS Co., Ltd., Nanxiong, 512400, People''s Republic of China;7. Management Committee of Shaoguan NanXiong Hi-tech Industry Development Zone, Nanxiong, 512400, People''s Republic of China;1. Beijing Institute of Technology, School of Mechatronical Engineering, Beijing, 100081, China;2. Zhejiang Sci-tech University, Graduate School, Hangzhou, Zhejiang, 310018, China;3. Nanjing University of Science and Technology, School of Chemical Engineering, Nanjing, Jiangsu, 210094, China;4. Army Engineering University of PLA, Field Engineering Institute, Nanjing, Jiangsu, 210007, China;5. Beijing Key Laboratory of Metro Fire and Passenger Transportation Safety, China Academy of Safety Science and Technology, Beijing, 100012, China;1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, China;2. School of Mechanical Engineering, Purdue University, West Lafayette, IN, 47907-2088, USA;3. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 211816, China;1. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 210000, China;2. Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control, Nanjing, 210000, China;3. Nanjing Vocational University of Industry Technology, Nanjing, 210000, China;1. School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China;2. Xi''an Modern Chemistry Research Institute, Xi''an, 710065, China |
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| Abstract: | To achieve the rapid prediction of minimum ignition energy (MIE) for premixed gases with wide-span equivalence ratios, a theoretical model is developed based on the proposed idea of flame propagation layer by layer. The validity and high accuracy of this model in predicting MIE have been corroborated against experimental data (from literature) and traditional models. In comparison, this model is mainly applicable to uniform premixed flammable mixtures, and the ignition source needs to be regarded as a punctiform energy source. Nevertheless, this model can exhibit higher accuracy (up to 90%) than traditional models when applied to premixed gases with wide-span equivalence ratios, such as C3H8-air mixtures with 0.7–1.5 equivalence ratios, CH4-air mixtures with 0.7–1.25 equivalence ratios, H2-air mixtures with 0.6–3.15 equivalence ratios et al. Further, the model parameters have been pre-determined using a 20 L spherical closed explosion setup with a high-speed camera, and then the MIE of common flammable gases (CH4, C2H6, C3H8, C4H10, C2H4, C3H6, C2H2, C3H4, C2H6O, CO and H2) under stoichiometric or wide-span equivalence ratios has been calculated. Eventually, the influences of model parameters on MIE have been discussed. Results show that MIE is the sum of the energy required for flame propagation during ignition. The increase in exothermic and heat transfer efficiency for fuel molecules can reduce MIE, whereas prolonging the flame induction period can increase MIE. |
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| Keywords: | Minimum ignition energy Flame propagation Layer by layer Energy increment Prediction model Wide-span equivalence ratios |
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