Results 91 to 100 of about 11,915 (202)

Experimental Acoustic Investigation of Rotor Noise Directivity and Decay in Multiple Configurations

Aerospace
In the framework of the MATIM project, an acoustic test campaign was conducted on a platform derived from a commercial-class quadcopter within the CIRA semi-anechoic chamber.
Giovanni Fasulo, Giosuè Longobardo, Fabrizio De Gregorio, Mattia Barbarino   +3 more
doaj   +1 more source

Open photoacoustic cell for concentration measurements in rapidly flowing gas. [PDF]

Photoacoustics, 2023
Fekete J, Torma P, Szabó A, Balogh M, Horváth C, Weidinger T, Szabó G, Bozóki Z.   +7 more
europepmc   +1 more source

Application of Swept-Sine Excitation for Acoustic Impedance Education [PDF]

The NASA Langley Normal Incidence Tube (NIT) and Grazing Flow Impedance Tube (GFIT) are regularly employed to characterize the frequency response of acoustic liners through the eduction of their specific acoustic impedance.
Howerton, Brian M., Jones, Michael G., Vold, Havard   +2 more
core   +1 more source

Numerical Analysis of Aerodynamics and Aeroacoustics in Heterogeneous Vehicle Platoons: Impacts on Fuel Consumption and Environmental Emissions

Energies
The systematic economic development of European Union member states has resulted in a dynamic increase in road transport, accompanied by adverse environmental impacts.
Wojciech Bronisław Ciesielka, Władysław Marek Hamiga   +1 more
doaj   +1 more source

Entropy and Information Theory in Acoustics. [PDF]

Entropy (Basel), 2022
Li Y.
europepmc   +1 more source

Aeroacoustics of a porous plug supersonic jet noise suppressor [PDF]

The aeroacoustics of a porous plug supersonic jet noise suppressor was investigated. The needed modifications of the existing multistream coaxial jet rig; the compressed air facility and pressure controls; the design, the fabrication, and the ...
Das, I. S., Dosanjh, D. S., Matambo, T. J.   +2 more
core   +1 more source

Equations of motion for weakly compressible point vortices. [PDF]

Philos Trans A Math Phys Eng Sci, 2022
Llewellyn Smith SG, Chu T, Hu Z.
europepmc   +1 more source

Towards High-order Methods for Rotorcraft Applications [PDF]

, 2017
This work presents CFD results obtained with an efficient, high-order, finite-volume scheme. The formulation is based on the variable extrapolation MUSCL-scheme, and high-order spatial accuracy is achieved using correction terms obtained through ...
Barakos, George N., Jimenez-Garcia, Antonio   +1 more
core  

The Acoustic center of the École Centrale de Lyon: A historical perspective

Acta Acustica
The research team in acoustics at the École Centrale de Lyon was founded 50 years ago by Prof. Geneviève Comte-Bellot. In this paper we describe the growth of this team, now known as the Acoustic center of the École Centrale de Lyon (or Centre Acoustique
Juvé Daniel, Blanc-Benon Philippe
doaj   +1 more source

Effect of boattail geometry on the acoustics of parallel baffles in ducts [PDF]

Sound attenuation and total pressure drop of parallel duct baffles incorporating certain boattail geometries were measured in the NASA Ames Research Center 7- by 10-Foot Wind Tunnel.
Dudley, M. R., Soderman, P. T., Unnever, G.   +2 more
core   +1 more source