| Citation: | GAO Tianhua, LIU Yong, DENG Zijiang, et al. Investigation on ignition performance prediction model of typical model afterburner[J]. Journal of Aerospace Power, 2025, 40（2）：20220315 doi: 10.13224/j.cnki.jasp.20220315
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Based on the experiments and numerical simulation, the prediction models of lean oil ignition for three kinds of afterburner with evaporative slot, cavity and cavity strut were established. According to the Lefebvre semi-empirical ignition model, the comprehensive influence mechanism of inlet temperature, pressure and flow rate on fuel atomization and depleted fuel ignition boundary was analyzed. The semi-empirical model of fuel particle size was replaced, and a fully empirical ignition prediction model based on inlet boundary was formed. The model can explicitly reflect the favorable and unfavorable action mechanisms of inlet flow on ignition, and the error of prediction and experiment data of lean oil ignition boundary of the three combustion chamber models was less than 10%. The model method could provide a reference for the establishment of a prediction model for lean oil ignition in engineering afterburner.
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