[HTML][HTML] Turbulent boundary layer trailing-edge noise: Theory, computation, experiment, and application
When the pressure fluctuations caused by turbulence vorticity in the boundary layer are
scattered by a sharp trailing edge, acoustic energy is generated and propagated to the far …
scattered by a sharp trailing edge, acoustic energy is generated and propagated to the far …
Noise reduction mechanisms of sawtooth and combed-sawtooth trailing-edge serrations
F Avallone, WCP Van Der Velden, D Ragni… - Journal of Fluid …, 2018 - cambridge.org
Trailing-edge serrations are add ons retrofitted to wind-turbine blades to mitigate turbulent
boundary-layer trailing-edge noise. This manuscript studies the physical mechanisms …
boundary-layer trailing-edge noise. This manuscript studies the physical mechanisms …
[HTML][HTML] Recent Advances in Airfoil Self-Noise Passive Reduction
B Amirsalari, J Rocha - Aerospace, 2023 - mdpi.com
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 …
and aviation industries. This review paper provides valuable insights into flow-induced noise …
Experimental characterization of the turbulent boundary layer over a porous trailing edge for noise abatement
The hydrodynamic and acoustic fields for a NACA 0018 with solid and porous trailing edge
inserts are investigated. The porous inserts, covering 20% of the chord, are manufactured …
inserts are investigated. The porous inserts, covering 20% of the chord, are manufactured …
[HTML][HTML] Aeroacoustic airfoil shape optimization enhanced by autoencoders
J Kou, L Botero-Bolívar, R Ballano, O Marino… - Expert Systems with …, 2023 - Elsevier
Aeroacoustic noise is a major concern in wind turbine design that can be minimized by
optimizing the airfoils that shape the rotating blades. To this end, we present a framework for …
optimizing the airfoils that shape the rotating blades. To this end, we present a framework for …
Three-dimensional flow field over a trailing-edge serration and implications on broadband noise
F Avallone, S Pröbsting, D Ragni - Physics of Fluids, 2016 - pubs.aip.org
The three-dimensional flow field over the suction side of a NACA 0018 airfoil with trailing-
edge serrations was studied by means of time-resolved tomographic particle image …
edge serrations was studied by means of time-resolved tomographic particle image …
Analytical models of the wall-pressure spectrum under a turbulent boundary layer with adverse pressure gradient
This paper presents a comprehensive analytical approach to the modelling of wall-pressure
fluctuations under a turbulent boundary layer, unifying and expanding the analytical models …
fluctuations under a turbulent boundary layer, unifying and expanding the analytical models …
[HTML][HTML] Boundary layer characterization and acoustic measurements of flow-aligned trailing edge serrations
Trailing edge serrations designed to reduce airfoil self-noise are retrofitted on a NACA 0018
airfoil. An investigation of the boundary layer flow statistical properties is performed using …
airfoil. An investigation of the boundary layer flow statistical properties is performed using …
Mechanisms of broadband noise generation on metal foam edges
A Rubio Carpio, F Avallone, D Ragni, M Snellen… - Physics of …, 2019 - pubs.aip.org
The turbulent flow over a porous trailing edge of a NACA 0018 airfoil is experimentally
investigated to study the link between the hydrodynamic flow field and the acoustic …
investigated to study the link between the hydrodynamic flow field and the acoustic …
Trailing-edge noise comparability in open, closed, and hybrid wind tunnel test sections
MPJ Sanders, CFJ Koenjer, L Botero-Bolivar… - AIAA journal, 2022 - arc.aiaa.org
Open-jet, hard-wall, and hybrid test section configurations are typically used in wind tunnel
tests, aiming to represent the ideal free-flight condition. Each test section type requires …
tests, aiming to represent the ideal free-flight condition. Each test section type requires …