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Aeroelastic Analysis of a Supercritical Airfoil with Free-Play in Transonic Flow

Shun He1,*, Gaowei Cui2

1 School of Aerospace Science and Technology, Xidian University, Xi'an, 710126, China
2 Beijing Institute of Structure and Environment Engineering, Beijing, 100076, China

* Corresponding Author: Shun He. Email: email

The International Conference on Computational & Experimental Engineering and Sciences 2022, 24(1), 1-4. https://doi.org/10.32604/icces.2022.08753

Abstract

An investigation has been made into the nonlinear aeroelastic behavior of a supercritical airfoil (NLR 7301) considering free-play in transonic flow. Computational Fluid Dynamics (CFD) based on NavierStokes equations is implemented to calculate unsteady aerodynamic forces. A loosely coupled scheme with steady CFD and a graphic method are developed to obtain the static aeroelastic position. Frequency domain flutter solution with transonic aerodynamic influence coefficient is used to capture the linear flutter characteristic at different angle of attack (AoA). Time marching approach based on CFD is used to calculate the nonlinear aeroelastic response. The bifurcation diagram of pitching motion shows that as the airspeed increases, the limit cycle oscillation (LCO) appears then quenches, forming the first LCO branch; LCO occurs again and sustains until the divergence of the response, forming the second LCO branch. This phenomenon is essentially induced by the combined action of the static aeroelastic position caused by the camber effect of the airfoil and the S shape flutter boundary with respect to AoA.

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Cite This Article

APA Style
He, S., Cui, G. (2022). Aeroelastic analysis of a supercritical airfoil with free-play in transonic flow. The International Conference on Computational & Experimental Engineering and Sciences, 24(1), 1-4. https://doi.org/10.32604/icces.2022.08753
Vancouver Style
He S, Cui G. Aeroelastic analysis of a supercritical airfoil with free-play in transonic flow. Int Conf Comput Exp Eng Sciences . 2022;24(1):1-4 https://doi.org/10.32604/icces.2022.08753
IEEE Style
S. He and G. Cui, "Aeroelastic Analysis of a Supercritical Airfoil with Free-Play in Transonic Flow," Int. Conf. Comput. Exp. Eng. Sciences , vol. 24, no. 1, pp. 1-4. 2022. https://doi.org/10.32604/icces.2022.08753



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This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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