Influence of Blade Deformations on Open-Rotor Low-Speed and High-Speed Aerodynamics and Aeroacoustics

Falissard, Fabrice; Chelius, Alain; Boisard, Ronan; Gaveriaux, Robert; Canard-Caruana, S.; Delattre, Grégory; Gardarein, P.; Mauffrey, Yann

doi:10.2514/6.2017-3869

Cited by 3 publications

(1 citation statement)

References 31 publications

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“…Then, the noise radiation in the far-field from the aerodynamic information, which is reconstructed for 360 deg domain, is computed with ONERA's KIM solver. Although the phase-lag approach has some drawbacks such as the omission of information due to the simplification, it has been attractive for CROR's acoustic prediction in many papers [6,12,13] due to its ease of handling and good cost performance.…”

Section: Phase-lag Approachmentioning

confidence: 99%

Noise Prediction of an Open Fan Using Acoustic Analogy Approaches

Sugiyama,

Falissard,

Reboul

et al. 2023

inter noise

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The purpose of this study is to evaluate numerical aero-acoustic methods for the noise prediction of an open fan, which is expected to reduce CO2 emissions for the next generation of aircraft engines. The far-field noise is computed using a CFD/CAA approach. The unsteady Reynolds Averaged Navier-Stokes (uRANS) and the Ffowcs Williams-Hawkings (FWH) analogy using solid and permeable surfaces are applied. The phase-lag method (single-blade passage) is used for the purpose of calculation for aerodynamic flow and noise sources with ONERA elsA finite volume solver. The sensitivities to the numerical CFD setup as well as the position and formulation of FWH permeable surface for noise computation are discussed in this paper. The present noise prediction strategy is evaluated for approach and take-off operating conditions. In particular, several spatial discretization schemes and FWH surface locations are tested and compared to evaluate their influence on the noise levels and directivity.

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Section: Phase-lag Approachmentioning

confidence: 99%