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Experimental observation of diffusive-thermal oscillations of burner stabilized methane-air flames
Combustion and Flame ( IF 4.4 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.combustflame.2019.12.016 S. Nechipurenko , T. Miroshnichenko , N. Pestovskii , S. Tskhai , B. Kichatov , V. Gubernov , V. Bykov , U. Maas
Combustion and Flame ( IF 4.4 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.combustflame.2019.12.016 S. Nechipurenko , T. Miroshnichenko , N. Pestovskii , S. Tskhai , B. Kichatov , V. Gubernov , V. Bykov , U. Maas
Abstract In this work we experimentally investigate the onset of the diffusive-thermal instabilities for flat burner stabilized methane-air flames at normal pressure. The structure and dynamics of combustion fronts are studied by using visual imaging, including high-speed video recording, spectroscopic and acoustic measurements. Numerical simulations with a one-dimensional model for a burner stabilized flame with detailed reaction mechanisms are also conducted. The critical conditions for the emergence of flame oscillations and the period of pulsations are determined. The experimental data obtained with different techniques are found to be in good agreement and also correlate with the numerical results. The numerically calculated data are shown to be sensitive to the choice of the reaction mechanism. Thus a direct measurement and calculation of the critical conditions and the characteristics of flame oscillations open a new perspective for the verification and validation of detailed reaction mechanisms.
中文翻译:
燃烧器稳定甲烷-空气火焰扩散热振荡的实验观察
摘要 在这项工作中,我们通过实验研究了常压下扁平燃烧器稳定的甲烷-空气火焰的扩散热不稳定性的开始。通过使用视觉成像,包括高速视频记录、光谱和声学测量,研究了燃烧前沿的结构和动力学。还进行了具有详细反应机制的燃烧器稳定火焰的一维模型的数值模拟。确定出现火焰振荡的临界条件和脉动周期。发现使用不同技术获得的实验数据具有良好的一致性,并且也与数值结果相关。数值计算的数据显示对反应机理的选择很敏感。
更新日期:2020-03-01
中文翻译:
燃烧器稳定甲烷-空气火焰扩散热振荡的实验观察
摘要 在这项工作中,我们通过实验研究了常压下扁平燃烧器稳定的甲烷-空气火焰的扩散热不稳定性的开始。通过使用视觉成像,包括高速视频记录、光谱和声学测量,研究了燃烧前沿的结构和动力学。还进行了具有详细反应机制的燃烧器稳定火焰的一维模型的数值模拟。确定出现火焰振荡的临界条件和脉动周期。发现使用不同技术获得的实验数据具有良好的一致性,并且也与数值结果相关。数值计算的数据显示对反应机理的选择很敏感。