| Texto completo | |
| Autor(es): |
Carloni, Ana Cristina Neves
;
Azevedo, Joao Luiz F.
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | AIAA SCITECH 2023 FORUM; v. N/A, p. 15-pg., 2023-01-01. |
| Resumo | |
The current work is concerned with studying processes for constructing reduced-order models capable of performing transonic aeroelastic stability analyses in the frequency domain based on computational fluid dynamics (CFD) techniques. The CFD calculations are based on the Euler equations, and the code uses a finite volume formulation for general unstructured grids. A centered spatial discretization with added artificial dissipation is used, and an explicit Runge-Kutta time marching method is employed. The dynamic system considered in the present work is a NACA 0012 airfoil-based typical section in the transonic regime. Unsteady calculations are performed for mode-by-mode and simultaneous excitation approaches, the latter defined by orthogonal Walsh functions. System identification techniques are employed to allow the splitting of the aerodynamic coefficient time histories into the contribution of each individual mode to the corresponding aerodynamic transfer functions. Generalized unsteady aerodynamic forces are approximated by a rational transfer function in the Laplace domain, in which nonlinear parameters are selected through a non-gradient optimization process. Different types of interpolating polynomials are tested and the results are compared. Results show that the proposed procedure can reproduce literature aeroelastic analysis data with a single unsteady CFD run. (AU) | |
| Processo FAPESP: | 22/01397-0 - Análise aeroelástica de flutter transônico com modelo de ordem reduzida baseado em resultados de CFD |
| Beneficiário: | Ana Cristina Neves Carloni |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |
| Processo FAPESP: | 13/07375-0 - CeMEAI - Centro de Ciências Matemáticas Aplicadas à Indústria |
| Beneficiário: | Francisco Louzada Neto |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |