| Full text | |
| Author(s): |
Total Authors: 3
|
| Affiliation: | [1] Univ Sao Carlos, Sao Carlos - Brazil
[2] Sao Paulo State Univ, Sao Joao Da Boa Vista - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | NONLINEAR DYNAMICS; v. 107, n. 3 JAN 2022. |
| Web of Science Citations: | 0 |
| Abstract | |
Stall flutter is turning into a more likely condition to be encountered as the demand for increasingly more flexible wings grows for HALE-like aircraft. Due to the various nonlinearities involved that can lead to complex motion, the characterization of the dynamical behavior in the post-flutter condition becomes important. The dynamics of a pitch-plunge idealized HALE typical section with aerodynamic, structural and kinematic nonlinearities in the stall flutter regime was investigated using an aeroelastic state-space formulation which includes a modified Beddoes-Leishman dynamic stall model. The results reveal that period-doubling was possible without stall, but chaos arose at discontinuity-induced bifurcations due to dynamic stall. A parametric study has been conducted to assess the influence of key parameters in the development of bifurcations and chaos. (AU) | |
| FAPESP's process: | 17/02926-9 - Airfoil unsteady aerodynamic loading assessment under dynamic stall for semi-empirical model validation |
| Grantee: | Flávio Donizeti Marques |
| Support Opportunities: | Regular Research Grants |