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Slat Noise from an MD30P30N Airfoil at Extreme Angles of Attack
(Amer Inst Aeronautics Astronautics, 2018-03-01)
This study investigates the slat noise of a two-dimensional scaled, unswept, and untapered MD30P30N high-lift model. The experimental data refer to aeroacoustic and aerodynamic measurements in a closed-section wind tunnel ...
Dynamics of the large-scale structures and associated noise emission in airfoil slats
(Cambridge Univ Press, 2019-09-25)
We investigate the slat narrowband peak noise generating mechanism. Unsteady flow data were generated by a lattice-Boltzmann-based commercial code for four configurations, accounting for variations of the airfoil angle of ...
Effect of Bubble Seal on Slat Noise
(Amer Inst Aeronautics Astronautics, 2019-04-01)
This paper reports a study of the sound emitted by a slat of a two-dimensional three-element MD30P30N airfoil, on which a two-dimensional excrescence was installed to represent a sealing device. Experiments were conducted ...
SPOD analysis of noise-generating Rossiter modes in a slat with and without a bulb seal
(2021-01-01)
The slat represents an important airframe noise source as it extends over almost the entire aircraft wingspan. Most studies of slat noise consider idealized geometries. However, for practical applications, several elements ...
On closed-section wind-tunnel aeroacoustic experiments with a two-dimensional lifting body
(2019-05-01)
Slat noise experiments are sometimes performed to provide data for the validation of numerical procedures. Under such circumstances, closed-section wind-tunnels, in contrast with open-section ones, offer well-defined ...
Acoustic environment and gas production in different growing- finishing swine facilities
(Engenharia Agrícola, 2019)
Improvements in closed-section wind-tunnel beamforming experiments of acoustic sources distributed along a line
(2019-12-15)
Phased-array microphone techniques are widely used tools for the measurement and analysis of aeroacoustic noise sources. Nevertheless, beamforming results of sources distributed along a line, such as airfoil trailing-edge ...
Gases e ruídos em edificações para suínos: aplicação das normas NR-15, CIGR e ACGIHGases and noise level in swine housing: application of the NR-15, CIGR and ACGIH norms
(Associação Brasileira de Engenharia Agrícola, 2005)