Results 31 to 40 of about 12,206 (226)

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, Lorenzo Tieghi, Giovanni Delibra, Valerio Francesco Barnabei, Alessandro Corsini   +4 more
doaj   +1 more source

Numerical aeroacoustic analysis of propeller designs [PDF]

, 2018
As propeller-driven aircraft are the best choice for short/middle-haul flights but their acoustic emissions may require improvements to comply with future noise certification standards, this work aims to numerically evaluate the acoustics of different ...
Barakos, George N., Bown, Nicholas, Chirico, Giulia   +2 more
core   +1 more source

Effect of a Control Mechanism on the Interaction between a Rectangular Jet and a Slotted Plate: Experimental Study of the Aeroacoustic Field

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, Marwan Alkheir, Hassan Assoum, Bilal El Zohbi, Kamel Abed-Meraim, Anas Sakout, Mouhammad El Hassan   +6 more
doaj   +1 more source

CAA Modeling of Helicopter Main Rotor in Hover [PDF]

, 2017
In this work rotor aeroacoustics in hover is considered. Farfield observers are used and the nearfield flow parameters are obtained using the in house HMB and commercial Fluent CFD codes (identical hexa-grids are used for both solvers). Farfield noise at
Barakos, George, Batrakov, Andrey S., Dančová, P., Kusyumov, Alexander N., Kusyumov, Sergey A., Mikhailov, Sergey A.   +5 more
core   +2 more sources

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, Baohong Bai, Dakai Lin, Peiqing Liu   +3 more
doaj   +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, Romani Gianluca, Jantzen Andreas, Czwielong Felix, Schoder Stefan   +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, Tatsuya ISHII, Shunji ENOMOTO, Hitoshi ISHIKAWA   +3 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, Codina, Ramon, Guasch Fortuny, Oriol, Pont Ribas, Arnau, Sánchez Martín, Patricia   +4 more
core   +3 more sources

Research progress on analysis and test methods of aircraft panel flutter

Hangkong gongcheng jinzhan
Aircraft 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, WANG Binwen, SONG Qiaozhi, LI Xiaodong, CHEN Haoyu   +4 more
doaj   +1 more source