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Towards Hybrid CAA with ground effects

Jacob, Marc C. and Dragna, Didier and Cahuzac, Adrien and Boudet, Jérôme and Blanc-Benon, Philippe Towards Hybrid CAA with ground effects. (2014) International Journal of Aeroacoustics, 13 (3 - 4). 235-259. ISSN 1475-472X

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Official URL: https://doi.org/10.1260/1475-472X.13.3-4.235

Abstract

CAA based on the Linearised Euler Equations (LEE) is applied to propagate aerodynamic sound over an extended distance including ground effects. The LEE are coupled to data from an LES via an acoustic analogy to follow-up the sound from the source to the extended far field: the complete chain is illustrated on the sound generated by a cylinder in a M ∼ 0.2 and Re ∼ 48000 flow. A very good agreement is found in free field between the approach based on the Ffowcs-Williams & Hawkings (FWH) analogy only and the combined FWH-LEE approach. The ability of the combined approach to handle complex boundary conditions is illustrated on the same data set with a rigid and a grassy ground.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Institut National des Sciences Appliquées de Lyon - INSA (FRANCE)
Other partners > Université Claude Bernard-Lyon I - UCBL (FRANCE)
Other partners > Ecole Centrale de Lyon (FRANCE)
Laboratory name:
Funders:
European Union - Agence Nationale pour la Recherche (ANR -10 -LABX-0060/ANR-11-IDEX-0007)
Statistics:download
Deposited By: Marc C. JACOB
Deposited On:09 Jul 2019 14:35

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