Results 11 to 20 of about 11,915 (202)
The Sound Attenuation Coefficient Optimization in Case of a Three Parameter Impedance Model for a Rectangular 3D Straight Lined Duct of Finite Dimensions [PDF]
INCAS Bulletin, 2015 A method for the minimization of the ratio of the sound pressure level at the exit to that at the entrance is presented for a rectangular 3D straight lined duct carrying a uniform gas flow.
Stefan BALINT +2 more
doaj +1 more source
Hybrid Computation of the Aerodynamic Noise Radiated by the Wake of a Subsonic Cylinder
Fluids, 2023 The noise radiated by the flow around a cylinder in the subcritical regime at ReD=1×104 and at a subsonic Mach number of M=0.5 is here studied. The aerodynamic sound radiated by a cylinder has been studied with a wide range of Reynolds numbers, but there
Benet Eiximeno +3 more
doaj +1 more source
Atmosphere, 2021 This paper addresses one of the recognized barriers to the unrestricted adoption of Unmanned Aircraft (UA) in mainstream urban use—noise—and reviews existing approaches for estimating and mitigating this problem.
Rohan Kapoor +4 more
doaj +1 more source
Comparison of outflow boundary conditions for subsonic aeroacoustic simulations [PDF]
, 2011 Aeroacoustics simulations require much more precise boundary conditions than classical aerodynamics. Two classes of non-reflecting boundary conditions for aeroacoustics are compared in the present work: characteristic analysis based methods and Tam and ...
Berenger +23 more
core +3 more sources
Reduced dimension modeling of leading edge turbulent interaction noise [PDF]
, 2014 A computational aeroacoustics approach is used to model the effects of real airfoil geometry on leading edge turbulent interaction noise for symmetric airfoils at zero angle of attack.
Bailly C. +5 more
core +1 more source
UHBR Open-Test-Case Fan ECL5/CATANA
International Journal of Turbomachinery, Propulsion and Power, 2022 The application of composite fans enables disruptive design possibilities but increases sensitivity to multi-physical resonance between aerodynamic, structure dynamic and acoustic phenomena.
Valdo Pagès +6 more
doaj +1 more source
IEEE Access, 2018 The acquisition of aeroacoustics signals of wind turbines is of great significance in environmental noise assessment and fault monitoring of blades. The single acoustic sensor is simpler and more flexible than the acoustic sensors array but it lacks ...
Ya'nan Zhang, Shengbo Qi, Lin Zhou
doaj +1 more source
Surrogate Modeling of the Aeroacoustics of an NM80 Wind Turbine
International Journal of Turbomachinery, Propulsion and Power, 2023 Wind turbines play a major role in the European Green Deal for clean energy transition. Noise is a critical aspect among open technological issues, as it determines the possibility of onshore installations near inhabited places and the possible ...
Filippo De Girolamo +4 more
doaj +1 more source
Residual-based stabilization of the finite element approximation to the acoustic perturbation equations for low Mach number aeroacoustics [PDF]
, 2016 This is the peer reviewed version of the following article: [Guasch, O., Sánchez-Martín, P., Pont, A., Baiges, J., and Codina, R. (2016) Residual-based stabilization of the finite element approximation to the acoustic perturbation equations for low Mach ...
Baiges Aznar, Joan +4 more
core +3 more sources
Fluids, 2023 The aeroacoustic field of a rectangular subsonic jet impinging on a slotted plate was investigated experimentally using microphones and stereoscopic particle image velocimetry (S-PIV).
Nour Eldin Afyouni +6 more
doaj +1 more source