Influence of Transonic Flutter on the Conceptual Design of Next-Generation Transport Aircraft

Transonic aeroelasticity is an important consideration in the conceptual design of next-generation aircraft configurations. This paper develops a low-order physics-based flutter model for swept high-aspect-ratio wings. The approach builds upon a previously developed flutter model that uses the flowf...

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Bibliographic Details
Published in:AIAA journal 2019-05, Vol.57 (5), p.1973-1987
Main Authors: Opgenoord, Max M. J, Drela, Mark, Willcox, Karen E
Format: Article
Language:English
Subjects:
Aeroelasticity
Aircraft
Aircraft configurations
Aircraft design
Computational fluid dynamics
Computer simulation
Conceptual design
Configuration management
Design
High aspect ratio
Transonic flutter
Transport aircraft
Two dimensional models
Vibration
Vorticity
Wings (aircraft)
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Summary:Transonic aeroelasticity is an important consideration in the conceptual design of next-generation aircraft configurations. This paper develops a low-order physics-based flutter model for swept high-aspect-ratio wings. The approach builds upon a previously developed flutter model that uses the flowfield’s lowest moments of vorticity and volume-source density perturbations as its states. The contribution of this paper is a new formulation of the model for swept high-aspect-ratio wings. The aerodynamic model is calibrated using offline two-dimensional unsteady transonic computational-fluid-dynamics simulations. Combining that aerodynamic model with a beam model results in a low-dimensional overall aeroelastic system. The low computational cost of the model permits its incorporation in a conceptual design tool for next-generation transport aircraft. The model’s capabilities are demonstrated by finding transonic flutter boundaries for different clamped-wing configurations and investigating the influence of transonic flutter on the planform design of next-generation transport aircraft.
ISSN:0001-1452
1533-385X
DOI:10.2514/1.J057302