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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of Graduate School of Engineering, Nagasaki University > Volume 44, No. 83 >


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Title: プロペラファンの翼端渦によって発生する周期的な空力騒音に関する研究(羽根枚数の影響)
Other Titles: Study of Periodical Aerodynamic Noise Generated due to Tip Vortex of a Propeller Fan (Influence on Number of Blades)
Authors: 佐々木, 壮一 / 村上, 寛明
Authors (alternative): Sasaki, Soichi / Murakami, Hiroaki
Issue Date: Jul-2014
Publisher: 長崎大学大学院工学研究科 / Graduate School of Engineering, Nagasaki University
Citation: 長崎大学大学院工学研究科研究報告, 44(83), pp.7-12; 2014
Abstract: In order to discuss the major factor on the noise characteristics of a propeller fan, the influence of the number of blades on the periodical fan noise generated due to the tip vortex is analyzed. The influence of the tip vortex on the fan noise is argued by the measured internal flow. For the analysis of the structure on the mean flow in the blade passage, the phase of the unsteady signal of the wake is locked by the trigger signal synchronized with the rotation signal. The noise generated from the tip vortex became 200 Hz even if the number of blades was different. We clarified experimentally that the periodical noise due to the tip vortex became small according to the scale of the tip vortex.
Keywords: Fan / Turbomachinery / Tip Vortex / Aerodynamic Noise / Wake / Velocity Distribution
URI: http://hdl.handle.net/10069/34564
ISSN: 18805574
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:Volume 44, No. 83

Citable URI : http://hdl.handle.net/10069/34564

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