Experimental and Numerical Study on Wall Impedance Effects on Tollmien–Schlichting Waves

Rouviere, Adrien; Méry, Fabien; Methel, Jeanne; Vermeersch, Olivier; Forte, Maxime

doi:10.2514/1.j060536

Cited by 5 publications

(4 citation statements)

References 18 publications

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“…T-S waves are a result of the interaction between the smooth laminar (undisturbed) flow near the surface and disturbances in the flow, mostly due to imperfections or perturbations [20]. As the fluid flows over the surface, these disturbances can grow and evolve into more pronounced oscillations, eventually leading to the transition from a laminar flow to a turbulent flow [21]. This transition from laminar to turbulent flow is an important consideration in aeroacoustics as it leads to increased far-field noise emission [22].…”

Section: Aeroacoustic Methodsmentioning

confidence: 99%

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Recent Advances in Airfoil Self-Noise Passive Reduction

Amirsalari,

Rocha

2023

Aerospace

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Airflow-induced noise prediction and reduction is one of the priorities for both the energy and aviation industries. This review paper provides valuable insights into flow-induced noise computation, prediction, and optimization methods with state-of-the-art efforts in passive noise reduction on airfoils, blades, and wings. This review covers the combination of several approaches in this field, including analytical, numerical, empirical, semi-empirical, artificial intelligence, and optimization methods. Under passive noise reduction techniques, leading and trailing edge treatments, porous materials, controlled diffusion airfoils, morphing wings, surface treatments, and other unique geometries that researchers developed are among the design modification methods discussed here. This work highlights the benefits of incorporating multiple techniques to achieve the best results concerning the desired application and design. In addition, this work provides an overview of the advantages and disadvantages of each tool, with a particular emphasis on the possible challenges when implementing them. The methods and techniques discussed herein will help increase the acoustic efficiency of aerial structures, making them a beneficial resource for researchers, engineers, and other professionals working in aviation noise reduction.

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Section: Aeroacoustic Methodsmentioning

confidence: 99%

“…face, these disturbances can grow and evolve into more pronounced oscillations, eventually leading to the transition from a laminar flow to a turbulent flow [21]. This transition from laminar to turbulent flow is an important consideration in aeroacoustics as it leads to increased far-field noise emission [22].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Airfoil Self-Noise Passive Reduction

Amirsalari,

Rocha

2023

Aerospace

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“…The first row in Table 1 refers to the transition position over the solid wall panel, and is provided to show the destabilizing effect of the porous wall without suction on the boundary layer. This effect is related to the wall impedance, and is discussed in further details in Rouviere et al (2021).…”

Section: Reference Configuration: Wall Suction On Smooth Flat Platementioning

confidence: 98%

Experimental investigation on the effect of forward-facing steps and gaps combined with wall suction on boundary layer transition

Methel

Forte

Vermeersch

et al. 2022

Preprint

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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“…The second column in Table 1 refers to the transition position over the solid wall panel, and is provided to show the destabilizing effect of the porous wall without suction on the boundary layer. This effect is related to the wall impedance, and is discussed in further details in Rouviere et al (2021).…”

Section: Reference Configuration: Wall Suction On Smooth Flat Platementioning

confidence: 98%

Experimental investigation on the effect of forward-facing steps and gaps combined with wall suction on boundary layer transition

et al. 2021

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Experimental and Numerical Study on Wall Impedance Effects on Tollmien–Schlichting Waves

Cited by 5 publications

References 18 publications

Recent Advances in Airfoil Self-Noise Passive Reduction

Recent Advances in Airfoil Self-Noise Passive Reduction

Experimental investigation on the effect of forward-facing steps and gaps combined with wall suction on boundary layer transition

Experimental investigation on the effect of forward-facing steps and gaps combined with wall suction on boundary layer transition

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