| Citation: | HU Chenxu, PAN Yang, ZHENG Qiangang, et al. Aero-engine component level model considering OTDF and NOx emission characteristics[J]. Journal of Aerospace Power, 2023, 38（11）：2766-2775 doi: 10.13224/j.cnki.jasp.20220005
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An aero-engine component level model considering outlet temperature distribution factor (OTDF) and nitrogen oxides (NOx) emission characteristics was established, which provided a simulation platform for the study of engine combustor outlet temperature distribution and emission control. Taking a variable cycle engine as the research object, the three-dimensional combustor model was designed according to its design point parameters. Based on CFD numerical simulation method, the OTDF characteristics and NOx emission characteristics of the three-dimensional combustor model under different working conditions at sea level were obtained. Based on this, a component level model of variable cycle engine was established, which can calculate the characteristic parameters of combustor under full envelope and full state. Compared with the traditional component level model, the model can accurately calculate the combustor outlet temperature distribution and NOx emission under different working conditions and different envelope points. The simulation results showed that there was a negative correlation between the temperature distribution coefficient at the outlet of the combustor and the working state of the engine. The higher engine speed indicated, the smaller OTDF and the better temperature distribution quality at the outlet of the combustor. There was a positive correlation between the NOx emission at the outlet of the combustor and the working state of the engine. The higher engine speed indicated more NOx emission at the outlet of the combustor, which was in line with the basic law of engine combustion.
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