Results 21 to 30 of about 34,975 (261)
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
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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
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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
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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.
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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
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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
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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
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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
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Aerodynamic and aeroacoustic properties of axial fan blades with slitted leading edges
Acta Acustica, 2022 A detailed experimental analysis of the aerodynamic and aeroacoustic properties of flat-plate axial fans with slitted leading edges is performed. The sound emissions of five slitted leading edge designs are measured at a constant rotational speed and at ...
Ocker Christof +4 more
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Noise-Source Identification for Ducted Fan Systems [PDF]
AIAA Journal, 2007 Coherence-based source analysis techniques can be used to identify the contribution of combustion noise in the exhaust of a jet engine and to hence enable the design of noise-reduction devices. However, when the combustion noise propagates in a nonlinear fashion, the identified contribution using ordinary coherence methods will be inaccurate.
BENNETT, GARETH, FITZPATRICK, JOHN AIDAN
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