A burner design with integrated electrodes was used to couple a gliding arc (GA) discharge to a high-power and large-scale turbulent flame for flame stabilization. Simultaneous OH and CH₂O planar laser-induced fluorescence (PLIF) and CH PLIF measurements were conducted to visualize instantaneous structures of the GA-assisted flame. Six different regions of the GA-assisted flame were resolved by the multi-species PLIF measurements, including the plasma core, the discharge-induced OH region, the post-flame OH region, the flame front, the preheat CH₂O region and the fresh gas mixture. Specifically, the OH profile was observed to be ring-shaped around the gliding arc discharge channel. The formaldehyde (CH₂O) was found to be widely distributed in the entire measurement volume even at a low equivalence ratio of 0.4, which suggest that long-lived species from the gliding arc discharge have induced low-temperature oxidations of CH₄. The CH layer coincides with the interface of the OH and CH₂O regions and indicates that the flame front and the discharge channel are spatially separated by a distance of 3–5 mm. These results reveal that the discharge column acts as a movable pilot flame, providing active radicals and thermal energy to sustain the flame. High-speed video photography was also employed to record the dynamics of the GA-assisted flame. This temporally resolved data was used to study the ignition and propagation behaviors of the flame in response to a temporally modulated burst-mode discharge. The results indicate that turbulent flame can be sustained by matching temporal parameters of the high-voltage bursts to the extinction time of flame.

具有集成电极的燃烧器设计用于将滑行电弧（GA）放电耦合到大功率大规模湍流火焰，以实现火焰稳定。进行了同时的OH和CH ₂ O平面激光诱导荧光（PLIF）和CH PLIF测量，以可视化GA辅助火焰的瞬时结构。通过多物种PLIF测量可分辨出GA辅助火焰的六个不同区域，包括等离子体核，放电诱导的OH区域，火焰后OH区域，火焰前部，预热CH ₂ O区域和新鲜气体混合物。具体地，观察到OH轮廓在滑动电弧放电通道周围为环形。甲醛（CH ₂O）即使在0.4的低当量比下也被广泛分布在整个测量体积中，这表明来自滑动电弧放电的长寿命物种已引起CH ₄的低温氧化。CH层与OH和CH ₂的界面重合O区域，表示火焰前沿和排放通道在空间上隔开3-5毫米。这些结果表明，放电塔起着可移动的引燃火焰的作用，提供了活性自由基和热能来维持火焰。高速视频摄影也被用来记录GA辅助火焰的动力学。该时间分辨的数据用于研究响应于时间调制的突发模式放电的火焰的点火和传播行为。结果表明，通过使高压脉冲的时间参数与火焰的熄灭时间相匹配，可以维持湍流火焰。