| Citation: | LI Jingru, HUANG Yong. Large eddy simulation of effect of spray spatial distribution on ignition characteristics[J]. Journal of Aerospace Power, 2025, 40（6）：20230640 doi: 10.13224/j.cnki.jasp.20230640
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In order to investigate the effect of fuel spray spatial distribution on ignition characteristics, large eddy simulation method combined with discrete phase model and dynamic thickening flame model was used to simulate the flow and combustion process in the axial-radial swirler combustion chamber. The results showed that the local droplet concentration and distribution range of the high concentration in the ignition area determined the formation of the initial flame kernel and the propagation process of the flame. Especially in the early stage of flame development, the hollow conical fuel spray flame mainly propagated in circumferential and axial directions, while the solid conical fuel spray flame propagated in circumferential, axial and radial directions at the same time, and the fuel spray spatial distribution of different injection modes corresponded to the flame morphology after stability. The large eddy simulation method was used for the first time in reproducing the phenomenon that the fuel spray distribution determined the flame distribution observed in other scholars’ experiments, proving that Sauter mean diameter (SMD) alone cannot represent all the effects of atomization characteristics on the fuel spray combustion process.
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