| Citation: | CUI Xiangmin, LIU Fan, SHAO Binbin, et al. Parameter design and application of turbofan engine nozzle feedback system[J]. Journal of Aerospace Power, 2025, 40（2）：20220537 doi: 10.13224/j.cnki.jasp.20220537
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In order to ensure the real-time feedback accuracy of the nozzle feedback system during the working process of the turbofan engine, the mathematical model of hot and cold states was established by motion analysis for reasonable design of the nozzle feedback system parameters, and the Spearman rank correlation coefficient method was used to analyze the sensitivity of the nozzle feedback system parameters. The method of parameter design was put forward and verified by engineering application. Results showed that the relationship between nozzle throat diameter and feedback angle was linear in the process of nozzle feedback system. The distance from the support point of the compensation to the support point of the pulley, the angle between the pulley support rocker arm and the feedback support rocker arm, and the distance from the initial center of the pulley to the pulley support hinge point constituted the main parameters affecting the real-time feedback accuracy of the nozzle feedback system, and the influence of the three parameters was similar. The optimal solution of the parameters can be found to ensure the real-time feedback accuracy of the nozzle feedback system through global optimization using the established parameter design method. The application of this research result on a certain type of aero-engine showed a high consistency of the linear relationship between the nozzle throat diameter and the feedback angle (the difference in nozzle throat area was within 0.17% at the same feedback angle), which can effectively ensure the real-time feedback accuracy of the nozzle feedback system, verifying the rationality and effectiveness of the parameter design method for the nozzle feedback system.
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