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チューブラー遠心送風機から発生する干渉騒音の特性


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Title: チューブラー遠心送風機から発生する干渉騒音の特性
Other Titles: Interaction Noise Generated from a Tubular Centrifugal Fan
Authors: 林, 秀千人 / 児玉, 好雄 / 淵上, 真一郎 / 深野, 徹
Authors (alternative): Hayashi, Hidechito / Kodama, Yoshio / Fuchigami, Shinnichirou / Fukano, Toru
Issue Date: Dec-2002
Publisher: 日本工業出版
Citation: ターボ機械 30(12), p.733-740. 2002
Abstract: Discrete frequency noise (DFN) generated from a tubular centrifugal fan was investigated experimentally and theoretically.It was made clear that the DFN is caused by the interaction of the rotor blades with the distorted inlet flow, but not with the stator blades. It is effective for reducing the DFN level that the inlet nozzle is lengthened to the duct diameter and set the honeycomb in it. In the latter case, the DFN level can be reduced almost to the turbulent noise level. The DFN level was theoretically predicted. The prediction shows that the noise source concentrates to the leading edge of the blade. And the characteristic lengths are almost constant for any inlet distortion. The predicted noise level agrees with the experimental results.
Keywords: Noise / Tubular fan / Interaction noise / Inlet distortion
URI: http://hdl.handle.net/10069/7509
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/7509

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