Results 21 to 30 of about 11,915 (202)
A Numerical Study on the Flap Side-Edge Noise Reduction Using Passive Blowing Air Concept
Aerospace, 2023 The flap side-edge is a vital contributor to airframe noise. In this study, we propose a novel flap side-edge noise reduction method based on the concept of active blowing air.
Yingzhe Zhang +3 more
doaj +1 more source
Numerical Investigation of Installed Jet Noise Sensitivity to Lift and Wing/Engine Positioning [PDF]
, 2018 The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.As the turbofan engines of modern transport aircraft have increasingly larger bypass ratios, by necessity ...
Angelino M. +5 more
core +1 more source
Effect of Wedge-Shaped Deflectors on Flow Fields of Dual-Stream Jets [PDF]
, 2007 The effect of wedge-shaped fan flow deflectors on the mean and turbulent flow-fields of dual-stream jets is investigated. Several wedge-shaped deflector concepts were used to create asymmetry in the plume of a dual-stream jet issuing from a scaled down ...
Papamoschou, Dimitri +2 more
core +1 more source
Numerical flow noise simulation of an axial fan with a Lattice-Boltzmann solver
Acta Acustica, 2023 In this paper, a transient and compressible solver based on the Lattice-Boltzmann Method/Very Large Eddy Simulation (LBM/VLES) approach is employed to predict unsteady flow physics and flow-induced noise generation of a low-pressure axial fan ...
Antoniou Evangelos +4 more
doaj +1 more source
Local correlations for flap gap oscillatory blowing active flow control technology [PDF]
INCAS Bulletin, 2010 Active technology for oscillatory blowing in the flap gap has been tested at INCAS subsonic wind tunnel in order to evaluate this technology for usage in high lift systems with active flow control. The main goal for this investigation was to validate TRL
Cătălin NAE
doaj +1 more source
Study on the behavior of fluid acoustic device by numerical simulation
Nihon Kikai Gakkai ronbunshu, 2023 This paper describes computational study to investigate the aero-acoustic mechanism observed in Hartmann generator when under-expanded supersonic jet is blown from a convergent nozzle.
Taichi FUJIMOTO +3 more
doaj +1 more source
Automotive aeroacoustics: An overview [PDF]
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2017 Vehicle aeroacoustic performance has a major influence on customer perception and also has importance for safety and comfort. Wind noise performance was once differentiated by the quality of sealing. Today, achieving competitive wind noise performance also depends on minimising aeroacoustic noise sources generated by the vehicle form, and on ...
Oettle, Nicholas, Sims-Williams, David
openaire +2 more sources
Research progress on analysis and test methods of aircraft panel flutter
Hangkong gongcheng jinzhanAircraft panel flutter is a typical aeroelastic stability problem that occurs during supersonic flight，and is characterized by aerodynamic unilateral effects and significant structural and aerodynamic nonlinearity.
HE Chuanyang +4 more
doaj +1 more source
Acoustic Metamaterials in Aeronautics
Applied Sciences, 2018 Metamaterials, man-made composites that are scaled smaller than the wavelength, have demonstrated a huge potential for application in acoustics, allowing the production of sub-wavelength acoustic absorbers, acoustic invisibility, perfect acoustic mirrors
Giorgio Palma +4 more
doaj +1 more source
Multidisciplinary Optimization Design of Low-Noise Propellers
Aerospace, 2023 In this paper, a multidisciplinary optimization design method and its verification of low-noise aircraft propellers considering aerodynamics, noise, and structural strength were carried out to further reduce the aerodynamic noise of the aircraft ...
Dongwen Xue +3 more
doaj +1 more source