Evaluation of Unsteady Aerodynamic Effects in Stall Region for a T-Tail Transport Model
| Autor: | Duc H. Nguyen, Mikhail Goman, Mark H. Lowenberg, Simon A. Neild |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Nguyen, D H, Goman, M, Lowenberg, M H & Neild, S A 2022, Evaluation of Unsteady Aerodynamic Effects in Stall Region for a T-Tail Transport Model . in AIAA SciTech Forum 2022 : AIAA SciTech Forum ., AIAA 2022-1932, American Institute of Aeronautics and Astronautics Inc. (AIAA), 2022 AIAA SciTech Forum, San Diego, United States, 3/01/22 . https://doi.org/10.2514/6.2022-1932 |
| ISSN: | 2022-1932 |
| Popis: | View Video Presentation: https://doi.org/10.2514/6.2022-1932.vidAlthough quasi-steady aerodynamic modelling is a widely used technique, its shortcomings in representing the stall and post-stall dynamics have been noted in the literature. Various methods to model the unsteady aerodynamics effects have been proposed as a result, but their direct implications on the aircraft’s flight dynamics characteristics have not been widely studied. In this paper, we combine the state-space method for unsteady aerodynamic modelling with bifurcation analysis to examine the sensitivity of stall and post-stall behaviour to the choice of aerodynamic modelling method: quasi-steady or unsteady. It is found that quasi-steady modelling is adequate for the chosen example of a T-tailed transport aircraft that does not undergo rapid manoeuvring. The study is then expanded to investigate a hypothetical situation with highly unsteady aerodynamic characteristics resembling a delta wing configuration – achieved by increasing the time delay constants in the unsteady model. This results in an aircraft with significantly lower flying qualities as indicated by bifurcation analysis. These findings highlight the need to implement unsteady aerodynamic modelling techniques in high-performance aircraft with significant vortex-related unsteady aerodynamics in order to sufficiently capture their stall and post-stall dynamics. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|