Aeroelastic Analysis Using Deforming Cartesian Grids

Ongoing work in air-vehicle design illustrates the potential of advanced concepts to provide significant improvements in efficiency; but with their incorporation of lightweight flexible structures, such configurations may require active control systems to ensure reliability and safety. However, many...

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Bibliographic Details
Published in:AIAA journal 2023-03, Vol.61 (3), p.1095-1108
Main Authors: Boschitsch, Alexander H., Whitehouse, Glen R.
Format: Article
Language:English
Subjects:
Active control
Aeroelasticity
Approximation
Automation
Cartesian coordinates
Centroids
CFD
Computational fluid dynamics
Configuration management
Copyright
cut-cell cartesian grids
Deformation
Finite element method
Flexible structures
Fluid dynamics
Fluxes
Geometry
MATHEMATICS AND COMPUTING
Mesh generation
Nonlinear dynamics
Reliability analysis
Solvers
Structural models
Turbulence models
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Summary:Ongoing work in air-vehicle design illustrates the potential of advanced concepts to provide significant improvements in efficiency; but with their incorporation of lightweight flexible structures, such configurations may require active control systems to ensure reliability and safety. However, many contemporary analysis methods are inefficient for aeroelastic analysis and design of such configurations. This paper describes the development of a new approach that automates the geometry setup, mesh generation, and assembly of fluid–structural coupling interfaces to enable efficient aeroelastic and aeroservoelastic analysis of advanced concepts. The core elements for this approach are a cut-cell Cartesian grid-based computational fluid dynamics solver, a nonlinear beam element structural model, a conservative fluid–structural interface treatment, and the formulation and implementation of a new deforming grid capability within the cut-cell Cartesian grid solver. Herein, emphasis is on this latter component with detailed description given of the mesh motion strategy, evaluation of fluxes and structural loads at the surface, and computation of geometrical properties such as cell volume, directed face areas, centroids, and motion-induced fluxes for deforming Cartesian grids required to advance the flow states. Aeroelastic simulations exercising the capability show favorable agreement with data and predictions in the literature for subsonic and supersonic applications.
ISSN:0001-1452
1533-385X
DOI:10.2514/1.J062125