Results 11 to 20 of about 45,316 (310)
Fan Noise Reduction: An Overview [PDF]
International Journal of Aeroacoustics, 2001 Fan noise reduction technologies developed as part of the Advanced Subsonic Technology Program are reviewed. Developments in low-noise fan stage design, swept and leaned outlet guide vanes, active noise control, fan wake management, and scarf inlets are discussed.
Envia, Edmane
openaire +2 more sources
Numerical assessment of fan blades screen effect on fan/OGV interaction tonal noise [PDF]
, 2020 This work deals with sound generation and transmission in a fan stage. The study is done on a subsonic Fan stage and interaction noise between the fan wakes and the Outlet Guide Vanes (OGV) is considered. For this purpose, the Linearized Euler Equations (
DELIGANT, Michael +5 more
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Aero-acoustical Study of Axial Fan using Computational Fluid Dynamics [PDF]
Journal of Agricultural Machinery, 2020 Introduction The issue of noise pollution is one of the concerns of most societies and industries because of their relationship to the environmental comfort of life or work of people are paying attention. The Aero-acoustics not only because of government
B Sabralilou +3 more
doaj +1 more source
A Review of Bionic Structures in Control of Aerodynamic Noise of Centrifugal Fans
Energies, 2023 Due to the complexity of the working conditions and the diversity of application scenarios, the normal operation of a fan, whether volute tongue, volute shell surface, or blade, often encounters some unavoidable problems, such as flow separation, wear ...
Wenqiang Zhou +5 more
doaj +1 more source
Acoustic Safety Management at the Locksmith’s Workplace Mechanic-Repairman to Replace the Filter Material in the Technological Process of Obtaining of Apatite Concentrate [PDF]
EPJ Web of Conferences, 2021 In this work, measures are being developed to reduce the noise level at the workplace of a mechanic-repairman to replace filter cloth. Based on the results of production control and a thorough assessment of working conditions, the source of noise was ...
Chalovskaya Ekaterina +4 more
doaj +1 more source
Experimental study on vibration and noise characteristics of small fan motors
Nihon Kikai Gakkai ronbunshu, 2014 In this paper, the phenomenon of vibration and noise in a small fan motor caused by electromagnetic forces were experimentally investigated. First, vibration characteristics of the fan motor in a non-operating state were determined by experimental modal ...
Masaki OGUSHI +6 more
doaj +1 more source
Energies, 2022 To improve the aerodynamic performance and reduce the noise of multi-blade centrifugal fans used in air conditioners, a bionic groove structure was introduced into the blade tip design, inspired by the drag reduction characteristics of mantis shrimp.
Ziqian Xu +4 more
doaj +1 more source
Energy Science & Engineering, 2023 Indoor air conditioning systems play a crucial role in regulating the environmental conditions of enclosed spaces. The noise generated by such systems can significantly impact human comfort.
Jian Lei +4 more
doaj +1 more source
Noise Prediction of Centrifugal Fan Based on Improved Nenral Network [PDF]
E3S Web of Conferences, 2021 In order to solve the problems that the prediction accuracy of the traditional centrifugal fan is low and the cost is high, a noise prediction model for centrifugal fan based on improved particle swarm optimization (IPSO) optimized BP neural network was ...
Long Bo +3 more
doaj +1 more source
Large Eddy Simulation of the ACAT1 fan stage for broadband noise prediction
, 2023 International audienceA numerical study is carried out to assess the aerodynamic and noise radiation specific features of the ACAT1 fan stage, which was tested in the framework of the European project TurbonoiseBB. This study deals with the prediction of
Jacob, Marc +7 more
core +1 more source