Results 191 to 200 of about 21,854 (248)

Aeroacoustics

2014
Journal Aerospace Lab, Issue 7, June 2014; ISSN: 2107 ...
Gely, Denis, Leylekian, Laurent, Lebrun, Maxime, Lempereur, Pierre, Delrieux, Yves, Polacsek, Cyril, Barrier, Raphael, Kohlhaas, Michael, Carolus, Thomas, Kausche, Philip, Moreau, Antoine, Kennepohl, Fritz, Simon, Frank, Haase, Thomas, Unruh, Oliver, Pohl, Martin, Tijs, Emiel, Wijntjes, Rik, Van Der Wal, Henk, Ghiringhelli, Gian Luca, Duran, Ignacio, Nicoud, Franck, Livebardon, Thomas, Bouty, Eric, Poinsot, Thierry, Bailly, Christophe, Andre, Benoit, Castelain, Thomas, Henry, Cyprien, Bodard, Guillaume, Porta, Mauro, Redonnet, Stephane, Minci, Daniel-Ciprian, Manoha, Eric, Malbequi, Patrice   +34 more
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Numerical investigation of aeroacoustics damping performance of a Helmholtz resonator: Effects of geometry, grazing and bias flow

Aerospace Science and Technology, 2019
In this work, the effects of the grazing flow and its geometric dimensions on the aeroacoustics damping performance of a Helmholtz resonator are numerically evaluated.
Gang Wu, Zhengli Lu, Xiao Xu, Weichen Pan, Weiwei Wu, Jun Li, J. Ci   +6 more
semanticscholar   +1 more source

Aeroacoustics

Annual Review of Fluid Mechanics, 1977
SummaryThe high noise levels of early turbojet aircraft forced attention to be given to the mechanics of the noise generation process and ways were urgently sought for silencing their high speed propulsive ...
openaire   +1 more source

Overview of the Use of Large-Eddy Simulations in Jet Aeroacoustics

, 2020
The current state of the use of large-eddy simulations (LESs) in jet aeroacoustics is reviewed. Various computational techniques are discussed, as well as methods to extend the LES results to the a...
A. Lyrintzis, Marco Coderoni
semanticscholar   +1 more source

Experimental and theoretical studies of aeroacoustics damping performance of a bias-flow perforated orifice

Applied Acoustics, 2019
Aeroacoustics damping performance of an in-duct perforated orifice with a bias flow in terms of acoustic power absorption Δ and reflection χ coefficients are evaluated in this work.
Dan Zhao, Yuze Sun, Siliang Ni, C. Ji, Dakun Sun   +4 more
semanticscholar   +1 more source

90 Years of Galbrun’s Equation: An Unusual Formulation for Aeroacoustics and Hydroacoustics in Terms of the Lagrangian Displacement

, 2020
The field of aeroacoustics has gained much attention since the well-known acoustic analogies were first published in the 1950s.
M. Maeder, G. Gabard, S. Marburg
semanticscholar   +1 more source

Aeroacoustic Carousel

AIAA Journal, 2005
Closed-Circuit wind tunnels in which air is driven by fans are widely used for aerodynamic testing. For aeroacoustic tests, in which the radiated sound field must be measured in the presence of flow, they have two major problems: the fan makes them noisy, and the hard walls make them reverberant.
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Aeroacoustic instability in rockets

37th Joint Propulsion Conference and Exhibit, 2001
Current solid-propellant rocket instability calculations (e.g., Standard Stability Prediction Program ) account only for the evolution of acoustic energy with time. However, the acoustic component represents only part of the total unsteady system energy; additional kinetic energy resides in the shear waves that naturally accompany the ...
Gary A. Flandro, Joseph Majdalani
openaire   +1 more source

Aeroacoustics of Musical Instruments

Annual Review of Fluid Mechanics, 2012
We are interested in the quality of sound produced by musical instruments and their playability. In wind instruments, a hydrodynamic source of sound is coupled to an acoustic resonator. Linear acoustics can predict the pitch of an instrument. This can significantly reduce the trial-and-error process in the design of a new instrument.
Fabre, Benoît, Gilbert, Joël, Hirschberg, Avraham, Pelorson, Xavier   +3 more
openaire   +3 more sources

Advances in Experimental Aeroacoustics

International Journal of Aeroacoustics, 2013
A review of modern experimental methods in aeroacoustics is provided along with sample applications. Specific emphasis has been placed on four advanced experimental techniques: (i) beamforming, (ii) acoustic holography, (iii) phase averaging and simultaneous flow/acoustic measurements and (iv) higher order spectral analysis.
Ganesh Raman, Rakesh Ramachandran, K. Srinivasan, Robert Dougherty   +3 more
openaire   +1 more source