Variations on the same BANC Category 8 theme: Towards the Development of a High Fidelity Acoustic Hybrid Method using Computational AeroAcoustics

Abstract : In regard to the mitigation of noise annoyance by aircraft, the present work addresses acoustic hybrid approaches, which allow simulating a given noise problem via successive weakly-coupled computations. Within that context, over the past four years, several R&D works were conducted at Onera so as to improve and optimize an already existing high fidelity acoustic hybrid approach, which noise propagation stage relies on a Computational Aeroacoustics (CAA) method. Consisting in dedicated theoretical studies, algorithmic developments and numerical simulations, these R&D works resulted in fundamental insights and methodological innovations. The latter were all validated against various test cases of increasing complexity, which were mostly derived from test cases proposed within the Benchmark for Airframe Noise Computations (BANC) initiative supported by NASA. This shows how international benchmark efforts such as the ones promoted through BANC initiative constitute a key means for improving numerical methods in acoustics, whether it is by offering to consolidate further already existing approaches, or by helping in making novel techniques emerge.
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S. Redonnet, G. Cunha. Variations on the same BANC Category 8 theme: Towards the Development of a High Fidelity Acoustic Hybrid Method using Computational AeroAcoustics. AIAA AVIATION 2014, Jun 2014, ATLANTA, United States. ⟨hal-01069401⟩

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