2023
DOI: 10.1177/17568277231209133
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Lean flameout characteristics and unsteady dynamics of swirling non-premixed flame with and without outer flame

Yuanhong Qi,
Bin Hu,
Shi Qiang
et al.

Abstract: The planar laser induced hydroxyl fluorescence (OH-PLIF) technique was used to study three kinds of swirling flame, namely flames I, II, and III, by changing swirl conditions. According to the PLIF results, double structure exists in flames I and II. The inner flame burns in the inner shear layer and is anchored by vortex breakdown, which is similar to the M- or V-shaped flame. The unique outer flame is attached to the inner wall of the air annular nozzle and burns in the outer shear layer. The lean blowout (L… Show more

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