| Our country is a major coal-producing country, but the frequent event of coal mine disasters, including the most serious gas explosion caused a huge loss of life and property. To reduce the gas explosion occurred strengthen safety management on the one hand, on the other hand must grasp to breed gas explosion. To rule on the event and spread of coal mine gas explosion in a more comprehensive, fully understanding the bending underground roadway everywhere circumstances. The research team designed a gas explosion under complex conditions of laboratory equipment, produced a different angle bend pipes to simulate changes in the underground tunnel. Research methods used in this paper is a theoretical analysis, experimental research and numerical simulation. First, by referring to books, documents, conditions and propagation of gas explosion theoretical analysis, based on the analysis, combined with existing laboratory equipment, showed a pilot program. Test model of this paper is to 30°,45°,60°,90°,120°,135° 150° turning angle of seven pipes fill with 4m,5m,6m three different lengths of methane gas, detonated flame gas explosion resulting analysis after propagation in different bend angles in these of flame sensors, flame arrival time recording event watching points, the calculation and analysis of flame propagation speed variation of the procession speed and pipe bend angle. Meanwhile, the use of FLUENT software, combined with the test program, to show of a numerical model to simulate to explore of methane gas in the breed of flame waves. By TECPLOT software, after processing of the simulation results, get flame speed variation in a different corner pipeline. The numerical results were compared with the experimental conclusions, thus proving the reliability of the numerical simulation, further use of numerical simulation analysis of flame propagation after gas explosion during temperature changes. To accident prevention and rescue provide a theoretical basis and reference. |
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