涡扇发动机多动力学建模方法

doi:10.7527/S1000-6893.2018.22632

Abstract

Abstract: Considering the rotor inertia, the storage of mass and energy in volumes and the heat exchanging between high-temperature components and low-temperature components, an approach to model turbofan engines is presented. By adopting the shaft dynamics, the volume dynamics, and the thermodynamics, a nonlinear dynamic mathematical model for turbofan engines is formed. The characteristic parameters at the primary sections are obtained by solving a series of first-order ordinary differential equations. The new model can not only simulate the dynamic characteristics of 12 key parameters of turbofan engine, such as temperatures, pressures, and rotor speeds, but also improve the real-time performance by avoiding solving the traditional rotor dynamics iterative model. The comparison between the new model outputs and the test measurements is conducted. The results show that the static error is less than 1.6% and the maximum dynamic error is less than 5%, and the average time for a single flow-path computation is 0.009 ms.

Key words: turbofan engine, shaft dynamics, volume dynamics, thermodynamics, multi-dynamics modeling

CLC Number:

V233.7

PAN Muxuan, CHEN Qianglong, ZHOU Yongquan, ZHOU Wenxiang, HUANG Jinquan. A multi-dynamics approach to turbofan engine modeling[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(5): 122632-122632.

References

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A multi-dynamics approach to turbofan engine modeling

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