Acoustic prediction of LAGOON landing gear : cavity noise and coherent structures
Tulio R. Ricciardi, William R. Wolf, Rachelle Speth
ARTIGO
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Agradecimentos: The authors gratefully acknowledge the partial support for thisresearch provided by Conselho Nacional de DesenvolvimentoCientífico e Tecnológico under research grant number 305277/2015-4. This work is also supported by Fundação de Amparo à Pesquisa doEstado de São Paulo under...
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Agradecimentos: The authors gratefully acknowledge the partial support for thisresearch provided by Conselho Nacional de DesenvolvimentoCientífico e Tecnológico under research grant number 305277/2015-4. This work is also supported by Fundação de Amparo à Pesquisa doEstado de São Paulo under research grants numbers 2013/03413-4and 2013/07375-0. The computational resources provided byCentro Nacional de Processamento de Alto Desempenho are alsogratefully acknowledged through project 551. The Boeing Companyis acknowledged for supporting the present research project throughproject number 2013-8985 and also for sharing the BCFD code usedin the numerical simulations. We acknowledge Andrew Cary, DericBabcock, Mark Fisher, and Nicholas Moffitt for several fruitfuldiscussions about technical details of this work. We finally would liketo thank José Fregnani and Antonini Macedo, from Boeing Research& Technology Brazil (BR&TB), and Paul Bent, from BoeingResearch & Technology (BR&T), for supporting the current researchproject. We acknowledge Eric Manoha for providing theexperimental data used for comparison in the current work. TheLAGOON database is owned by ONERA and Airbus Industries, andit was provided to the authors by ONERA under permission byAirbus Industries in the framework of the AIAA BANC Workshop
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Detached-eddy simulations of the LAGOON landing gear configuration are performed using different unstructured meshes. One mesh is generated based on available experimental and numerical data, and based on this first mesh, a second one is carefully designed to improve the solutions in regions of...
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Detached-eddy simulations of the LAGOON landing gear configuration are performed using different unstructured meshes. One mesh is generated based on available experimental and numerical data, and based on this first mesh, a second one is carefully designed to improve the solutions in regions of strong unsteadiness. Results are presented in terms of steady and unsteady hydrodynamic data as well as noise predictions, which are performed using the Ffowcs-Williams and Hawkings formulation. Numerical results show good agreement with experimental data available in the literature. A wavelet transform analysis demonstrates that the sound generation in the cavity is an intermittent process that leads to strongly varying amplitudes of the surface pressure and the far-field noise radiation. A proper orthogonal decomposition is employed to identify coherent energetic structures responsible for the cavity tones. Finally, it is shown how the local flow topology affects the impingement of these coherent structures on the cavity
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FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
2013/03413-4; 2013/07375-0
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
305277/2015-4
Aberto
DOI: https://doi.org/10.2514/1.J056957
Texto completo: https://arc.aiaa.org/doi/full/10.2514/1.J056957
Acoustic prediction of LAGOON landing gear : cavity noise and coherent structures
Tulio R. Ricciardi, William R. Wolf, Rachelle Speth
Acoustic prediction of LAGOON landing gear : cavity noise and coherent structures
Tulio R. Ricciardi, William R. Wolf, Rachelle Speth
Fontes
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AIAA journal Vol. 56, no. 11 (Nov., 2018), p. 4379-4399 |