| Citation: | MA Chao, ZHAO Shujie, XU Jianxin, et al. Construction method of aero-engine thermodynamic model based on QAR data[J]. Journal of Aerospace Power, 2023, 38（11）：2591-2600 doi: 10.13224/j.cnki.jasp.20220101
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In order to establish a thermodynamic model of aero-engine in an approximate real operating environment, a thermodynamic model construction method based on QAR (quick access recorder) data of aero-engine operation was proposed. According to the thermodynamic equation of the traditional design point of the engine, and using the least square identification principle, the equation for solving the pressure at the 25 station was corrected, and the dry air thermodynamic model was obtained; according to the additivity of the entropy value of the mixed gas, a thermodynamic model of wet air under rainfall conditions was constructed; finally, combined with particle swarm optimization optimized by genetic algorithm, the parameters of dry air and wet air thermodynamic model were calculated and verified according to QAR data. The results showed that the maximum error between the dry air and wet air thermodynamic parameters calculated by the thermodynamic model and the QAR data was less than 13%, which was closer to the actual adiabatic parameters. The feasibility of constructing a thermodynamic model of an engine based on QAR data and the effectiveness of the thermodynamic model construction method for solving thermodynamic parameters were proved.
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