Results 101 to 110 of about 12,206 (226)

Impact of Perforated Sheet Geometry on the Insertion Loss of Absorption Silencers

Archives of Acoustics
This study evaluates the influence of perforated sheet geometry on the acoustic and aerodynamic performance of absorption silencers. A modular silencer was developed, enabling the installation of six different perforated metal sheets with varying hole ...
Kamil Wójciak, Joanna Maria Kopania, Patryk Gaj   +2 more
doaj   +1 more source

Evaluating the Aerodynamic Impact of Circumferentially Grooved Fan Casing Treatments with Integrated Acoustic Liners on a Turbofan Rotor [PDF]

NASA is investigating the potential of integrating acoustic liners into fan cases to reduce fan noise, while maintaining the fan's aerodynamic performance.
Bozak, Richard F., Podboy, Gary G.
core   +1 more source

Aeroacoustics of the Bullroarer

, 2006
The present paper is about the physical understanding and a complete theoretical modelling of the sounding instrument called bullroarer and used by aboriginal tribesmen. The running of the bullroarer clearly involves aeromechanical aspects, closely related to the process of autorotation, as well as aeroacoustical aspects.
Roger, Michel, Aubert, Stéphane
openaire   +1 more source

AeroAcoustics.jl: A Julia package for aeroacoustics [PDF]

Journal of Open Source Software
Aeroacoustics is an interdisciplinary research field situated between aerodynamics and acoustics. It focuses on understanding the sound generated by the motion of air around solid bodies and plays an important role in research areas such as automotive, aerospace, and wind energy sciences (Allen et al., 2002).
openaire   +1 more source

Leading-Edge Noise Mitigation on a Rod–Airfoil Configuration Using Regular and Irregular Leading-Edge Serrations

Applied Sciences
Rod–airfoil configurations are commonly used to study turbulence–structure interaction noise, which is a major contributor to aerodynamic noise in various engineering applications.
Mehmet Numan Kaya, Sutharsan Satcunanathan, Matthias Meinke, Wolfgang Schröder   +3 more
doaj   +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

An aeroacoustic investigation into the effect of self-oscillating trailing edge flaplets [PDF]

The aeroacoustics of a NACA 0012 aerofoil with an array of self-oscillating flexible flaplets attached on the trailing edge has been investigated at low to moderate chord based Reynolds number (50,000 -- 350,000) and at geometric angles of attack from ...
Bruecker, C., Geyer, T. F., Talboys, E.
core  

Experimental Investigation of Rotor Noise in Reverse Non-Axial Inflow

Aerospace
This paper experimentally characterises the far-field noise emissions of a rotor operating in reverse non-axial inflow conditions. Specifically, experiments were undertaken at a range of rotor tilting angles and inflow velocities to investigate the ...
Liam Hanson, Leone Trascinelli, Bin Zang, Mahdi Azarpeyvand   +3 more
doaj   +1 more source

Influence of Gurney Flap and Leading-Edge/Trailing-Edge Flaps on the Stall Characteristics and Aeroacoustic Performance of Airfoils

Fluids
In aerospace, flow control techniques have improved the separation flow characteristics around airfoils by various means. In this paper, the delayed detached eddy simulation (DDES) technique is used to simulate the detailed flow field around the NACA0021
Zelin Liu, Kaidi Li, Xiaojing Sun
doaj   +1 more source

Near-Field Pressure Signature of New-Concept Supersonic Aircraft Obtained Using Open-Source Approach

Sci
This study investigates the numerical prediction of the sonic boom phenomenon in supersonic aircraft by evaluating the near-field pressure signatures of three different aeroshapes.
Antimo Glorioso, Francesco Petrosino, Mattia Barbarino, Giuseppe Pezzella   +3 more
doaj   +1 more source