Effective method of predicting confined pressure behavior under isotropic turbulence |
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| Institution: | 1. State Key Laboratory of Fine Chemicals, Department of Chemical Machinery and Safety Engineering, Dalian University of Technology, 2 Linggong Rd., Dalian, 116024, China;2. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081, China;1. College of Resources and Civil Engineering, Northeastern University, Shenyang, 110819, PR China;2. College Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China;3. Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, NO. 3-11, Wenhua Road, Heping District, Shenyang, Liaoning, 110819, China;4. School of Resources and Environmental Engineering, Jilin Institute of Chemical Technology, No. 45 Chengde Street, Longtan District, Jilin, 132022, China |
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| Abstract: | Explosion pressure prediction is indispensable to ensure process safety against accidental gas explosions. This work is aimed at establishing a theoretical method for predicting confined methane-air explosion pressure under isotropic turbulence. The results indicated that the pressure rise rate becomes significantly increased by the existence of isotropic turbulence, which effect on peak value of explosion pressure is negligible. Among various models of turbulent burning velocity, the calculated pressure rise rate using Chiu model, Williams model and Liu model is relatively closer to experimental value. With the increase of turbulent integral length and RMS turbulent fluctuation velocity, the pressure rise rate becomes increased continuously. The influence of adiabatic compression and isothermal compression on pressure rise rate could be ignored. To predict explosion pressure in a more accurate way, the dynamic variation of turbulent integral length and RMS turbulent fluctuation velocity should be considered in the future. |
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| Keywords: | Explosion pressure prediction RMS turbulent Fluctuation velocity Turbulent integral length Adiabatic compression |
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