| Citation: | GAO Chuming, JIA Linyuan, ZHANG Zhishu, et al. Inverse calculation method of starting throttling for turbojet engine based on experimental data[J]. Journal of Aerospace Power, 2025, 40（11）：20240602 doi: 10.13224/j.cnki.jasp.20240602
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In order to improve the accuracy of engine starting performance calculation based on the component method, a starting throttling inverse calculation method based on the power extraction method was proposed. It clearly defined the power balance relationship of the starting process, and established the nonlinear equations of the engine starting, so as to reversely evaluate the combustion efficiency based on the fuel flow, rotor acceleration rate and starter characteristics during the starting process. According to the similarity principle, the calculation method of converted torque scaling factor was proposed, the conversion between efficiency characteristics and torque characteristics was completed, and the effectiveness of the method was verified. Furthermore, a pre-ignition starting model was established, enabling the simulation of starting from zero to idle speed. The simulation model was validated based on the experimental data of a micro-turbojet engine, and the results showed that the maximum errors in the rotational speed and
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