民机极限飞行状态的动态气动力试验与建模

doi:10.7527/S1000-6893.2020.23664

流体力学与飞行力学

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民机极限飞行状态的动态气动力试验与建模

岑飞^1,2, 李清¹, 刘志涛², 蒋永², 张磊²

1. 清华大学自动化系, 北京 100084;
2. 中国空气动力研究与发展中心低速空气动力研究所, 绵阳 621000

收稿日期:2019-11-19 修回日期:2020-03-07 出版日期:2020-08-15 发布日期:2020-04-10
通讯作者: 李清 E-mail:liqing@tsinghua.edu.cn
基金资助:
国家自然科学基金（61771281）；新一代人工智能重大项目（2018AAA0101605）；2018年工业和信息化部工业转型升级专项（ZB1825005）；清华大学自主科研计划（2018Z05JZY015）

Unsteady aerodynamics test and modeling of civil aircraft under extreme flight conditions

CEN Fei^1,2, LI Qing¹, LIU Zhitao², JIANG Yong², ZHANG Lei²

1. Department of Automation, Tsinghua University, Beijing 100084, China;
2. Low Speed Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China

Received:2019-11-19 Revised:2020-03-07 Online:2020-08-15 Published:2020-04-10
Supported by:
National Natural Science Foundation of China(61771281); the New Generation Artificial Intelligence Major Project of China(2018AAA0101605); the 2018 Industrial Internet Innovation and Development Project(ZB1825005); the Tsinghua University Initiative Scientific Research Program(2018Z05JZY015)

摘要/Abstract

摘要： 飞行失控是造成民机灾难性航空事故的重要因素，飞行失控中飞机难以避免超出正常飞行包线范围，进入具有复杂非线性和非定常动态气动特性的极限飞行状态。本文开展典型民机布局飞机极限飞行状态的动导数、大振幅试验，对大迎角动态气动力的参数影响规律以及非线性、非定常特性进行分析和建模。结果表明，在飞机失速到过失速区域，飞行姿态快速变化过程中动态气动力的非线性和非定常特征显著；在动导数试验和建模中，考虑运动角速率的影响，可以预示气动力非线性的迎角范围，并捕捉到关于飞机动稳定性演化的关键特征；利用Goman-Khrabrov状态空间模型结合大振幅试验，可以确定模型中表征非定常特征的关键时间常数，获得特定极限飞行状态运动中的非定常动态气动力特性。研究方法和结果为开展民机极限飞行状态的动态气动力风洞试验设计与建模提供了一个可行途径，能改进飞机飞行失控预防、极限状态改出、飞行模拟训练和飞行事故分析等。

关键词: 风洞试验, 民机, 大迎角, 非定常气动力, Goman-Khrabrov模型

Abstract: Loss of control is an important cause of catastrophic aviation accidents, possibly exposing the aircraft under extreme flight conditions with complex nonlinear and unsteady aerodynamic characteristics beyond the normal flight envelope. The dynamic derivative and large amplitude wind tunnel tests under the extreme flight conditions are conducted to analyze the impact factors for dynamic aerodynamics and the nonlinear and unsteady characteristics. Results show that the nonlinear and unsteady characteristics of dynamic aerodynamics are significant in stall to incipient spin regions; for dynamic derivative test and modeling, the impact of the angular velocity of motion can be considered to predict the range of angle of attack of aerodynamic nonlinearity and capture the key characteristics related to the dynamic stability of flight maneuvers; using the Goman-Khrabrov state space model combined with the large amplitude test, the key time constants of the unsteady characteristics in the model can be determined, and the unsteady aerodynamic characteristics in the specific extreme flight state motion can be obtained. The research methods and results provide a promising way for the design and modeling of the dynamic aerodynamic test of civil aircraft under extreme flight conditions.

Key words: wind tunnel tests, civil aircraft, high angle of attack, unsteady aerodynamics, Goman-Khrabrov model

中图分类号:

V211.7

岑飞, 李清, 刘志涛, 蒋永, 张磊. 民机极限飞行状态的动态气动力试验与建模[J]. 航空学报, 2020, 41(8): 123664-123664.

CEN Fei, LI Qing, LIU Zhitao, JIANG Yong, ZHANG Lei. Unsteady aerodynamics test and modeling of civil aircraft under extreme flight conditions[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(8): 123664-123664.

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民机极限飞行状态的动态气动力试验与建模

Unsteady aerodynamics test and modeling of civil aircraft under extreme flight conditions

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