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Aeroacoustics - an overview | ScienceDirect Topics This paper is the 2016 issue of this collection of Aeroacoustic Highlights, compiled from contributions submitted to the CEAS-ASC The contributions are classified under three main headings; Aircraft and Turbomachinery Noise, Experimental and Numerical Methods and Further Applications of Aeroacoustics
Aeroacoustic simulation of flexible structures in low Mach number . . . The aeroacoustic computation of the turbulent flow past a circular cylinder at Reynolds number R e D = 48, 000 (based on the diameter D = 0 01 m) and Mach number M = 0 21 (c ∞ = 343 m s) is presented This flow configuration typically results in tonal sound radiation due to the vortex shedding from the cylinder surface and broadband noise
Aeroacoustics research in Europe: The CEAS-ASC report on 2022 . . . The spatial variation of acoustic liner impedance in aeroacoustic ducts at high sound pressure levels (SPLs) has been recently investigated in Ref [46] It is shown that impedance discontinuity between a rigid wall and the liner is a leading factor in defining the impedance variation in space
Aeroacoustic airfoil shape optimization enhanced by autoencoders Aeroacoustic noise is a major concern in wind turbine design that can be minimized by optimizing the airfoils that shape the rotating blades To this end, we present a framework for airfoil shape optimization to reduce the trailing edge noise for the design of wind turbine blades
A novel efficient calculation method for rotor aeroacoustic . . . Therefore, the estimation of rotor noise is a prerequisite for understanding the aeroacoustic characteristics and conducting noise suppression research [2], [3] Currently, numerical calculation methods based on CFD and FW-H equations have been widely used in the field of helicopter rotor noise
Aeroacoustic design and characterization of the 3D-printed, open-jet . . . Aeroacoustic wind tunnels can be obtained either by adapting existing facilities [27] or by designing completely new facilities from scratch [10], [28] The current work focuses on the aerodynamic and acoustic characterization of the recently refurbished anechoic open-jet wind-tunnel at Delft University of Technology (A-tunnel), which was
Aeroacoustic and aerodynamic optimization of propeller blades The aeroacoustic solvers used in this work consists of two distinct tools: the first one providing the tonal noise part of the propeller from the Hanson’s theory, and the second one computing the broadband noise due to turbulence in proximity of the trailing edge and the leading edge
Aeroacoustic simulation of human phonation based on the flow-induced . . . The aeroacoustic problem was modelled by the Lighthill analogy in the acoustic domain consisting of glottal region, vocal tract model and space outside the mouth The FSI with contact and acoustic problems were numerically discretized by the (stabilized) finite element method implemented in in-house solver written in C language
Prediction and measurement of axial flow fan aerodynamic and . . . The difference of the measured OASPL A in the anechoic and semi-anechoic chambers is unremarkable, which indicates that the ground floor being of some influence, but a use of an anechoic chamber aeroacoustic may be necessary to conduct a high accuracy aeroacoustic test for the fan system The evident difference between the measured results and