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- W4282567122 abstract "The present work addresses the installation effects expected for the tonal noise of a pair of side-by-side contrarotating subsonic propellers mounted near a wing trailing edge. This generic configuration mimics future urban air-vehicle architectures. The installation effects refer to the additional sources of aerodynamic noise caused by blade-wing interaction and their scattering by the wing, compared to the case of isolated propellers. The paper aims to demonstrate the ability of analytical models to estimate these effects, which is of primary interest for the preliminary design steps of an installed propulsion system. Furthermore, the analytical parametric study might help determine promising configurations for future aircraft. In the analytical formulation, dipole-like noise sources of the propellers are considered, assuming rigid blades. The sound radiation from the propellers is formulated in three dimensions for characteristic spinning modes of the tonal noise. In contrast, the half-plane Green's function accounts for the sound scattering by the wing. A finite-chord correction is applied to the half-plane formulation and validated by numerical simulations. The results show that the installation effect is crucial for analyzing tonal propeller noise at low frequencies. In particular, sound radiation is significantly increased when the blade tips operate in the close vicinity of the trailing edge." @default.
- W4282567122 created "2022-06-14" @default.
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- W4282567122 date "2022-06-13" @default.
- W4282567122 modified "2023-10-12" @default.
- W4282567122 title "Analytical study of the aerodynamic noise emitted by distributed electric propulsion systems" @default.
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- W4282567122 doi "https://doi.org/10.2514/6.2022-2830" @default.
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