Computational aeroacoustics of quadcopter drones
Applied Acoustics, 2022 T. Dbouk, D. Drikakis
semanticscholar +1 more source
Identification of the Aeroacoustic Emission Source Regions Within a Ceiling Swirl Diffuser
AcousticsThe acoustic emissions of ventilation systems and their subcomponents contribute to the perceived overall comfort in indoor environments and are, therefore, the subject of research.
Philipp Ostmann +2 more
doaj +1 more source
Efficient prediction of broadband trailing edge noise and application to porous edge treatment [PDF]
, 2018 Trailing edge noise generated by turbulent flow traveling past an edge of an airfoil is one of the most essential aeroacoustic sound generation mechanisms. It is of great interest for noise problems in various areas of industrial application.
Delfs, Jan +3 more
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FluidsThe rapid growth of drone use in urban areas has prompted authorities to review airspace regulations, forcing drone manufacturers to anticipate and reduce the noise emissions during the design stage.
Pietro Li Volsi +5 more
doaj +1 more source
Influence of Source Propagation Direction and Shear Flow Profile in Impedance Eduction of Acoustic Liners [PDF]
The acoustic impedance of liners is a key parameter for their design, and depends on the flow conditions, i.e., the sound pressure level and the presence of a grazing flow. The surface impedance of a locally reacting liner is defined as a local intrinsic
Jones, M. G. +5 more
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Acoustic Metamaterials in Aeronautics
Applied Sciences, 2018 Metamaterials, man-made composites that are scaled smaller than the wavelength, have demonstrated a huge potential for application in acoustics, allowing the production of sub-wavelength acoustic absorbers, acoustic invisibility, perfect acoustic mirrors
Giorgio Palma +4 more
doaj +1 more source
An aeroacoustic investigation into the effect of self-oscillating trailing edge flaplets [PDF]
The aeroacoustics of a NACA 0012 aerofoil with an array of self-oscillating flexible flaplets attached on the trailing edge has been investigated at low to moderate chord based Reynolds number (50,000 -- 350,000) and at geometric angles of attack from ...
Bruecker, C., Geyer, T. F., Talboys, E.
core
Analytical simulation of the far-field jet noise and the unsteady jet flow-field by a model of periodic shedding of vortex ring from the jet exit [PDF]
The construction of a theoretical flow field due to shedding of vortex rings, the identification of the controlling parameters, and the determination of whether the theoretical model successfully simulated the unsteady pressure field near jet (and ...
Liu, C. H.
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Aeroacoustic test system design and experimental research for counter-rotating propeller
Hangkong gongcheng jinzhanThe aerodynamic noise test of counter-rotating propellers in wind tunnels has the problems of difficult time coordination and high cost. The aerodynamic noise test system of counter-rotating propellers，which is capable of simulating the driving state of ...
CAO Qi +4 more
doaj +1 more source
An Investigation of Acoustic Back-Coupling in Human Phonation on a Synthetic Larynx Model. [PDF]
Bioengineering (Basel), 2023 Näger C +4 more
europepmc +1 more source