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Experimental and Numerical Study of the Impact of Initial Turbulence on the Explosion Behavior of Methane-Air Mixtures
Chemical Engineering & Technology ( IF 2.1 ) Pub Date : 2021-04-12 , DOI: 10.1002/ceat.202000619 Hua Wang 1 , Tao Chen 2
Chemical Engineering & Technology ( IF 2.1 ) Pub Date : 2021-04-12 , DOI: 10.1002/ceat.202000619 Hua Wang 1 , Tao Chen 2
Affiliation
The experimental parameters that significantly affect the gas explosion process were determined, investigating the pressure, temperature, and velocity in the methane-air explosion process under quiescent and turbulent conditions. Experiments and computational fluid dynamics simulations were integrated to optimize the experimental parameters and elucidate the impact of the initial turbulence on the explosion behavior of methane-air mixtures. Good agreement was achieved between the computed results and experimental data. For a certain CH4 concentration within the explosive limit range, an initial turbulence can increase the maximum explosion pressure and the maximum rate of the pressure rise, shorten the time to reach the maximum explosion pressure and enhance the explosion strength and destructive power of CH4-air mixtures. Turbulent flow can significantly broaden the explosive limits of CH4-air mixtures. The ignition delay time affects the distribution of the initial turbulence and thus the extent and severity of the explosions.
中文翻译:
初始湍流对甲烷-空气混合物爆炸行为影响的实验和数值研究
确定了对瓦斯爆炸过程有显着影响的实验参数,研究了静止和湍流条件下甲烷-空气爆炸过程中的压力、温度和速度。结合实验和计算流体动力学模拟来优化实验参数并阐明初始湍流对甲烷-空气混合物爆炸行为的影响。计算结果和实验数据之间取得了很好的一致性。对于爆炸极限范围内的一定CH 4浓度,初始湍流可以提高最大爆炸压力和最大压力上升率,缩短达到最大爆炸压力的时间,增强CH的爆炸强度和破坏力4-空气混合物。湍流可以显着拓宽 CH 4空气混合物的爆炸极限。点火延迟时间影响初始湍流的分布,从而影响爆炸的程度和严重程度。
更新日期:2021-06-18
中文翻译:
初始湍流对甲烷-空气混合物爆炸行为影响的实验和数值研究
确定了对瓦斯爆炸过程有显着影响的实验参数,研究了静止和湍流条件下甲烷-空气爆炸过程中的压力、温度和速度。结合实验和计算流体动力学模拟来优化实验参数并阐明初始湍流对甲烷-空气混合物爆炸行为的影响。计算结果和实验数据之间取得了很好的一致性。对于爆炸极限范围内的一定CH 4浓度,初始湍流可以提高最大爆炸压力和最大压力上升率,缩短达到最大爆炸压力的时间,增强CH的爆炸强度和破坏力4-空气混合物。湍流可以显着拓宽 CH 4空气混合物的爆炸极限。点火延迟时间影响初始湍流的分布,从而影响爆炸的程度和严重程度。