Smart control of multi-micro flames by combustion diagnostics with safety reporting type

本文以燃烧器上的多微火焰为对象，研究了安全报告型燃烧诊断的智能控制。我们制备了三种类型的多微燃烧器，其中采用3，7和19不锈钢管。19个燃烧器的预混火焰可燃范围较3个和7个燃烧器宽。我们测量了预混火焰亮度强度的时间序列，得到了亮度波动的均方根值、均方根值和平均归一化的功率谱密度。得到的RMS取决于流量和燃烧器的类型，并通过增加当量比而增加。在低频范围内观察到1/f谱，并且在足够大的当量比处发现功率谱密度的尖峰。此外，我们对火焰亮度波动进行了时间序列分析，得到了吸引子，研究了预混火焰的波动特性。火焰的吸引子类似于环面，火焰的行为具有准周期性。

In this paper, we treated multi-micro flames on burners to study the smart control by combustion diagnostics with safety reporting type. We prepared three types of multi-micro burners, where 3, 7, or 19 stainless tubes were adopted. The combustible range of premixed flames on 19 burners was wide compared with 3 and 7 burners. We measured the time series of brightness intensity of premixed flames and obtained the root mean square, RMS, and power spectrum density of the brightness fluctuation normalized by its average value. The obtained RMS depended on the flow rate and on type of burner and increased by increasing the equivalence ratio. The 1/f spectrum was observed in low frequency range, and the sharp peaks of power spectrum density were found at sufficiently large equivalence ratios. In addition, we performed the time series analysis on the brightness fluctuation, and also obtained the attractor to study the characteristics of the fluctuation of premixed flames. The attractors were similar to the torus, and then the behavior of premixed flames was quasi-periodic.