Flame regime estimations of gasoline explosion in a tube |
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| Affiliation: | 1. Department of Military Petroleum Supply Engineering, Logistical Engineering University, Chongqing 401311, China;2. Department of Architecture & Engineering, Logistics University of CAPF, Tianjin 300309, China;1. Beijing Municipal Institute of Labour Protection, Beijing 100068, PR China;2. Faculty of Resource and Safety Engineering, China University of Mining & Technology, Beijing, Beijing 100083, PR China;1. Saint Petersburg State University, Saint Petersburg, Russia;2. Institute of Computational Modelling SB RAS, 660036 Krasnoyarsk, Russia;3. Siberian Federal University, Krasnoyarsk, Russia;1. State Key Laboratory Cultivation Bases Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo, Henan 454003, PR China;2. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, PR China;3. Collaborative Innovation Center of Coal Safety Production of Henan Province, Henan Polytechnic University, Jiaozuo, Henan 454003, PR China;1. State key laboratory of fire science, University of Science and Technology of China, Hefei, 230026, PR China;2. The Civil Engineering School, Anhui Jianzhu University, Hefei, 230601, PR China |
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| Abstract: | Flame regime of gasoline-air mixture explosion is related to chemical reaction, turbulent flow and heat and mass transfer. Experimental data of gas velocity, pressure and flame temperature of gasoline-air mixture explosion in a tube at the equivalence ratio of 0.72, 1.00 and 1.28 were preliminarily acquired. Then, fluctuating velocities, overpressures, and burned and unburned gas temperatures at early stage (50 ms), intermediate stage (150 ms) and last stage (250 ms) in three explosions were determined through the analysis of the experimental data. Finally, the Damköhler number and Reynolds number of the early, intermediate and late stage were calculated respectively, and the flame regimes for each stage were estimated through the Damköhler number vs. Reynolds number diagram. Results show that all the flames at early, intermediate and late stage of the three explosions have the same regime of flamelets-in-eddies. The conclusions can provide some useful references for further study of the flame regime and the numerical analysis model selection of gasoline-air mixture explosion. |
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| Keywords: | Gasoline-air mixture explosion Flame regime Pressure Laminar flame speed Damköhler number |
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