Results 11 to 20 of about 5,629,785 (335)
Experimental Study on the Half Flat Tip Serrated Trailing Edge for Stand Fan
Archives of Acoustics, 2020 The effectiveness of half flat tip serrations on reducing fan blade trailing edge noise was investigated using experimental methods. The experiments were conducted at an anechoic chamber under different rotating fan speeds.
Hsiao Mun LEE +3 more
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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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Research on Noise Reduction of Axial Flow Fan Cover Based on CFD/CAA [PDF]
E3S Web of ConferencesTaking an axial fan for an electronic equipment chassis as the research object, combining the theories of Computational Fluid Dynamics (CFD) and Computational Aerodynamic Acoustics (CAA), the steady state and non-stationary analyses are carried out by ...
Chen Kui +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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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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Noise from Centrifugal Fans [PDF]
The Journal of the Acoustical Society of America, 1955 The sound power radiated from the discharge of centrifugal fans of diameters between 3 and 612 inches has been measured as a function of fan dimensions and operating conditions. The measurements were made by arranging the fan under test to discharge into an 11 foot nonreflecting tube in which the static pressure could be controlled.
R. B. Goldman, G. C. Maling
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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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Lifting Fan Noise Studies [PDF]
ASME 1969 Winter Annual Meeting: GT Papers, 1969 The paper reviews the results of an experimental investigation of noise radiated from a VTOL lifting fan inlet under static inflow conditions. The results are discussed in the light of recent theoretical and experimental conclusions on compressor noise radiation, combined with relevant data on the aerodynamic characteristics of the fan. The presence of
G. Krishnappa, G. G. Levy
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