| Citation: | WANG Hongyan, HUANG Yong, LIU Yunfeng, et al. Large eddy simulation on effect of spark phases on ignition reliability[J]. Journal of Aerospace Power, 2022, 37（10）：2344-2351 doi: 10.13224/j.cnki.jasp.20220237
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For the model combustor with a single dome, large eddy simulation was carried out to simulate the dynamic propagation process of flames at different ignition timing. In a pulsation cycle of the flow field, the effect of spark phases on ignition reliability was studied. The simulation results revealed that for the pulsating flow field in the model combustor, even within the range of ignition limits, the single spark pulse can not cause successful ignition at any spark phase. By comparing the frequency of the flow field with the characteristics of the single spark pulse, it was found that the duration of the single spark pulse was much shorter than the pulsation period of the flow field. This is the fundamental reason why spark phases seriously affect the ignition reliability. In order to eliminate the effect of spark phases on ignition reliability, it is suggested that a single spark pulse should be replaced by a series of spark pulses when using large eddy simulation to study ignition problems. And the duration of spark pulses should cover at least one complete pulsation cycle of the flow field.
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