Application of a smart material structure in the study of aerodynamic characteristics of a morphing wing

Lei Pengxuan; Wang Yuanjing; Lyu Binbin; Yu Li; Yang Zhenhua

doi:10.11729/syltlx20160166

Volume 31 Issue 5

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Journal of Experiments in Fluid Mechanics > 2017 > 31(5): 74-80. > DOI: 10.11729/syltlx20160166

Lei Pengxuan, Wang Yuanjing, Lyu Binbin, Yu Li, Yang Zhenhua. Application of a smart material structure in the study of aerodynamic characteristics of a morphing wing[J]. Journal of Experiments in Fluid Mechanics, 2017, 31(5): 74-80. DOI: 10.11729/syltlx20160166

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Application of a smart material structure in the study of aerodynamic characteristics of a morphing wing

China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China

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Received Date: October 31, 2016
Revised Date: January 13, 2017

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Abstract

In order to verify the feasibility and deformation capability of the intelligent material structure in the study on aerodynamic characteristics of the flexible variable trailing edge wing, the videogrammetric model deformation technique is used to measure the deflection of the trailing edge in the transonic wind tunnel, and the dynamic process of deflection is recorded. The pressure distribution on the upper wing surface is also measured. The Mach number is between 0.4 and 0.8, and the model's angle of attack is between 0° and 6°. The influence of flow condition on the structure deformation is analyzed. The test result shows that the flexible structure of the model can bear the aerodynamic load of the transonic flow and achieve the deflection. When the driving force is constant, the deformation is influenced by the Mach number and the angle of attack. The increase of Mach number weakens the deformation ability of the intelligent structure, which leads to the decrease of the deformation speed and the decrease of the trailing edge deflection angle. The influence of the angle of attack is more complex, and couples with the influence of the Mach number. The higher the Mach number, the stronger the influence of attack angle. Finally, through the analysis of the pressure distribution, it is concluded that the flow separation is the key factor to influence the deformation capacity of the intelligent material structure.
- morphing wings,
- high speed wind tunnel,
- videogrammetric model deformation,
- continuous smooth trailing edge,
- experimental research

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