Results 21 to 30 of about 1,595,600 (284)
Acoustics, 2020 Due to the fact that legal and market requirements are becoming stricter, fan noise reduction, in addition to energy efficiency, represent a challenge for fan product designers.
Rebecca Schäfer, Martin Böhle
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Effect of Distortion on Turbofan Tonal Noise at Cutback with Hybrid Methods
International Journal of Turbomachinery, Propulsion and Power, 2017 New ultra high bypass ratio architectures may significantly affect the fan tonal noise of future aircraft engines. Indeed, such a noise source is supposed to be dominated by the interaction of fan-blade wakes with outlet guide vanes.
Majd Daroukh +4 more
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Effect of inlet distortion with crosswind on aircraft-engine intake aerodynamic performance
Nihon Kikai Gakkai ronbunshu, 2022 This paper describes an experimental study on inlet distortion in the flow ingested to an intake of a ducted fan. Recent high bypass ratio engines tend to shorten the nacelle length for better fuel consumption.
Hiroki NARUSE +7 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
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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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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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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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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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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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