Results 61 to 70 of about 8,352,814 (137)

The influence of realistic 3D viscous mean flow on shielding of engine-fan noise by a 3-element high-lift wing [PDF]

, 2010
The prediction of aeroacoustic shielding often rests on tools using constant mean flow thus neglecting mean flow inhomogeneities such as shear layers. This study analyses the influence of this simplification on shielding.
Lidoine, Stéphane, Chappuis, Johanna, Roland Ewert, Johanna Chappuis, Juergen Dierke, Julien Ricouard, Stéphane Lidoine, Ewert, Roland, Dierke, Jürgen, Ricouard, Julien   +9 more
core   +1 more source

Numerical Aeroacoustic Assessment of a Metacontinuum Device Impinged by a Laser-Generated Sound Source

Journal of Engineering
Significant research efforts have been conducted by many research groups in the last decades to circumvent the acoustic metamaterial concept limitations.
Giada Colombo, Giorgio Palma, Umberto Iemma   +2 more
doaj   +1 more source

Passive Rotor Noise Reduction Through Axial and Angular Blade Spacing Modulation

Aerospace
This study investigates the aerodynamic and aeroacoustic performance of a novel two-stage two-bladed coaxial propeller that is axially and angularly spaced.
Chingiz Arystanbekov, Altay Zhakatayev, Basman Elhadidi   +2 more
doaj   +1 more source

Multi-objective Optimization of the Bionic Blade in the Multi-blade Centrifugal Fan for Electric Vehicles Application Based on an Orthogonal Test [PDF]

Journal of Applied Fluid Mechanics
The multi-blade centrifugal fan, whose aeroacoustic properties significantly affect the noise, vibration and harshness performance of electric vehicles, is an important part of the automotive air conditioning system.
J. Tang, J. Xu, B. Huang, J. Wang, L. Xu, X. Chen   +5 more
doaj   +1 more source

Numerical Study of Aeroacoustic Sound on Performance of Bladeless Fan

Chinese Journal of Mechanical Engineering, 2017
Aeroacoustic performance of fans is essential due to their widespread application. Therefore, the original aim of this paper is to evaluate the generated noise owing to different geometric parameters. In current study, effect of five geometric parameters was investigated on well performance of a Bladeless fan.
Mohammad Jafari, Atta Sojoudi, Parinaz Hafezisefat   +2 more
openaire   +1 more source

Automatic design optimisation of a transonic compressor rotor for improving aeroacoustic and aerodynamic performance

, 2022
Multidisciplinary design optimisation of transonic rotors, especially focusing on improving the aeroacoustic performance, has received little attention.
Long Wu, Alexander G. Wilson, Wu, Long, Shahpar, Shahrokh, Jae-Wook Kim, Shahrokh Shahpar, Wilson, Alexander, Kim, Jae Wook   +7 more
core   +1 more source

Hybrid Rotor Noise Optimization

Engineering Proceedings
This study examines noise reduction strategies for unmanned aerial vehicles (UAVs) in urban air mobility applications, with a particular focus on package delivery.
Philipp Mandl, Laura Babetto, Eike Stumpf, Christian Breitsamter   +3 more
doaj   +1 more source

An experimental study of airfoil instability tonal noise with trailing edge serrations [PDF]

, 2013
This paper presents an experimental study of the effect of trailing edge serrations on airfoil instability noise. Detailed aeroacoustic measurements are presented of the noise radiated by an NACA-0012 airfoil with trailing edge serrations in a low to ...
Joseph, PF, Chong, TP
core   +1 more source

Comparative study of aeroacoustic performance of 1/8 and 1/1 pantographs coupled with cavity

Railway Engineering Science
The technology of pantograph sinking in the cavity is generally adopted in the new generation of high-speed trains in China for aerodynamic noise reduction in this region. This study takes a high-speed train with a 4-car formation and a pantograph as the
Xiaoming Tan, Huifang Liu, Zhigang Yang, Hong Chen, Baojun Fu, Linli Gong   +5 more
doaj   +1 more source

Co-simulation approach for computational aero-acoustic modeling: Investigating wind-induced noise within two-way radio microphone ports cavity

Journal of Mechanical Engineering and Sciences
Wind-induced noise (aeroacoustic) can cause problem with any outdoor microphone applications, notably impacting the performance of telecommunication mobile. One prominent source in two way radios is the microphone port cavity.
Wan Masrurah Hairudin , Mohamed Nur Hidayat Mat , Lu Ean Ooi , Norilmi Amilia Ismail   +3 more
doaj   +1 more source