A multi-dynamics approach to turbofan engine modeling

PAN Muxuan; CHEN Qianglong; ZHOU Yongquan; ZHOU Wenxiang; HUANG Jinquan

doi:10.7527/S1000-6893.2018.22632

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2019 , Vol. 40 >Issue 5: 122632 - 122632

DOI: https://doi.org/10.7527/S1000-6893.2018.22632

Fluid Mechanics and Flight Mechanics

A multi-dynamics approach to turbofan engine modeling

PAN Muxuan ,
CHEN Qianglong ,
ZHOU Yongquan ,
ZHOU Wenxiang ,
HUANG Jinquan

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1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
2. AECC Aero Engine Control System Institute, Wuxi 214063, China

Received date: 2018-08-28

Revised date: 2018-09-21

Online published: 2018-11-23

Supported by

National Natural Science Foundation of China (51406084); Jiangsu Province Key Laboratory Foundation of Aerospace Power System (NJ20160020)

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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

Cite this article

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 . DOI: 10.7527/S1000-6893.2018.22632

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