| Citation: | WEI Wei, HUI Xin, AN Qiang, et al. Study on flame-flame interaction based on simultaneous PIV/PLIF test[J]. Journal of Aerospace Power, 2026, 41（6）：20250160 doi: 10.13224/j.cnki.jasp.20250160
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The particle image velocimetry (PIV) and planar laser-induced fluorescence (PLIF) were employed simultaneously to investigate the flow field, spray characteristics, and species distribution in both single-dome and triple-dome combustors from two distinct directions. The experimental results demonstrated that under low fuel-air ratio (FAR) conditions, the flame exhibited a distinct V-shaped structure stabilized within the shear layer at the interface between the corner recirculation zone and primary recirculation zone. At high FAR conditions, alterations in flame morphology and stabilization mechanisms were observed. The emission index of nitric oxide (EINOx) increased from 2 g/kg to 4.57 g/kg in the single-dome combustor, showing a more substantial rise from 1.28 g/kg to 9.99 g/kg in the triple-dome combustor results from the aerodynamic-thermal coupling induced by flame-flame interactions that promoted superposition of adjacent flow fields and flame. Conversely, the production of incomplete combustion products, including carbon monoxide (CO) and unburned hydrocarbons (UHC), remained statistically invariant. The experimental results conclusively established that flame-flame interactions in multi-dome combustor constituted a critical determinant of pollutant emission characteristics by modulating flow velocity, high-temperature zone volume, and high-temperature zone area, helping to provide valuable insights for the development of advanced aero-engines.
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