| Citation: | JIANG Yifeng, FU Chen, WANG Longzhu, et al. Experimental investigation on the light-round pattern of triple-swirler combustor[J]. Journal of Aerospace Power, 2025, 40（10）：20230772 doi: 10.13224/j.cnki.jasp.20230772
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The light-round pattern of kerosene spray flame in a triple-swirler combustor was investigated experimentally using simultaneous 10 kHz Mie scattering of droplet and OH* chemiluminescence (CL) measurements. It was shown that light-round pattern occurred in two different sub-phases, including the quasi-ignition phase and the adjacent swirling flame development phase. The linear and zigzag propagation patterns were identified in the former, and the upstream-entrainment (UE), downstream-hysteresis (DH), and multi-clusters-expansion (MCE) propagation patterns were recognized in the latter. The possibility of the light-round pattern was analyzed statistically. It was found that zigzag-MCE was the primary light-round pattern at different conditions with varying inlet air velocity, combustor pressure, and fuel-air ratio. However, under conditions near the light-round boundary, the zigzag-DH pattern appeared with a high probability of 77.8%. Similarly, under low air velocity or high fuel-air ratio, linear MCE patterns predominated.
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