Results 81 to 90 of about 4,706 (230)

DGLR/AIAA 14th aeroacoustics conference. Vol. 1 Proceedings

, 1992
In the Conference Volume 1 the following sessions are covered by 58 papers: 1. Is there a difference between aeroacoustics and aerodynamics? 2. Acoustic/fluid dynamic phenomena, 3. Sound transmission, 4.
Deutsche Gesellschaft fuer Luft- und Raumfahrt e.V., Bonn (Germany)
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Multi-Size-Mesh, Multi-Time-Step Algorithm for Noise Computation on Curvilinear Meshes [PDF]

, 2013
Aeroacoustic problems are often multi-scale and a zonal refinement technique is thus desirable to reduce computational effort while preserving low dissipation and low dispersion errors from the numerical scheme.
CORRE, Christophe, LE GARREC, Thomas, GLOERFELT, Xavier, Corre, Christophe Eric   +3 more
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The effect of wavy leading edges on aerofoil-gust interaction noise [PDF]

, 2013
High-order accurate numerical simulations are performed to investigate the effects of wavy leading edges (WLEs) on aerofoil–gust interaction (AGI) noise.
Lau, A.S.H., Kim, J.W., Haeri, S.
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INDUSTRIAL CFD SIMULATION OF AERODYNAMIC NOISE

, 2008
Real challenges to suppress undesirable fluid-excited acoustics are posed by a wide variety of engineering disciplines. Noise regulations, passenger comfort and component stability are motivators which are continuing to stimulate substantial efforts ...
Caridi, Domenico
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Identification of the Aeroacoustic Emission Source Regions Within a Ceiling Swirl Diffuser

Acoustics
The 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, Martin Kremer, Dirk Müller   +2 more
doaj   +1 more source

Effect of rotor stiffness and lift offset on the aeroacoustics of a coaxial rotor in level flight

, 2009
The acoustic characteristics of a twin contra-rotating coaxial rotor configuration with significant flapwise stiffness are investigated in steady forward flight.
Brown, R.E., Kim, Hyo Wan, Duraisamy, K., Kim, H.W., Duraisamy, Karthikeyan, Brown, Richard   +5 more
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Analysis of MAV Rotors Optimized for Low Noise and Aerodynamic Efficiency with Operational Constraints

Fluids
The 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, Gianluigi Brogna, Romain Gojon, Thierry Jardin, Hélène Parisot-Dupuis, Jean-Marc Moschetta   +5 more
doaj   +1 more source

Numerical Characterization of the Aeroacoustics of Tandem Propellers in Hover

This research focuses on the numerical analysis of aerodynamics and aeroacoustics of complex tandem propeller configurations for Vertical Take-Off and Landing vehicles. Results from solvers with different fidelity are compared.
Savino, Alberto, Abergo, Luca, Galimberti, Luca, Guardone, Alberto, Granata, Daniele, Parsani, Matteo, Caccia, Francesco A., Zanotti, Alex, Caccia, Francesco   +8 more
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Handling of spatially truncated source fields based on pressure time derivatives in hybrid computational aeroacoustics

, 2017
In hybrid computational aeroacoustics, the acoustic computation domain is oftentimes larger than the domain of the flow simulation. Consequently, discontinuities of the source field occur on the acoustic mesh, which can diminish the quality of the ...
Estorff, Otto von, Schröder, Thorben
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Acoustic liner optimisation and noise propagation through turbofan engine intake ducts

, 2013
The research in this thesis explores the prediction of fan noise propagation through turbofan engine intakes and its radiation to the far-field. The performance of acoustic liners installed in intakes to attenuate noise is the focus of the study.
Kewin, Matthew Fergus
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