| Autor: |
Jimenez Garcia, A., Biava, M., Barakos, G.N., Baverstock, K.D., Gates, S., Mullen, P. |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| ISSN: |
0001-9240 |
| Popis: |
This paper presents aerodynamic optimisation of tiltrotor blades with high-fidelity computational\ud fluid dynamics. The employed optimisation framework is based on a quasi-Newton\ud method, and the required high-fidelity flow gradients were computed using a discrete adjoint\ud solver. Single-point optimisations were first performed, to highlight the contrasting requirements\ud of the helicopter and aeroplane flight regimes. It is then shown how a trade-off blade\ud design can be obtained using a multi-point optimisation strategy. The parametrisation of the\ud blade shape allowed to modify the twist and chord distributions, and to introduce a swept tip.\ud The work shows how these main blade shape parameters influence the optimal performance\ud of the tiltrotor in helicopter and aeroplane modes, and how a compromise blade shape can\ud increase the overall tiltrotor performance. Moreover, in all the presented cases, the accuracy\ud of the adjoint gradients resulted in a small number of flow evaluations for finding the optimal\ud solution, thus indicating gradient-based optimisation as a viable tool for modern tiltrotor\ud design. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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