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ジェットファンの離散周波数騒音の研究 : 第 1 報 : 騒音に及ぼすハブコーンの影響


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Title: ジェットファンの離散周波数騒音の研究 : 第 1 報 : 騒音に及ぼすハブコーンの影響
Other Titles: Study on Discrete Frequency Noise Generated by a Jet Fan : First report : Effect of Hub Cone
Authors: 児玉, 好雄 / 林, 秀千人 / 木下, 朋行 / 村山, 将 / 近藤, 重樹 / 山口, 英告
Authors (alternative): Kodama, Yoshio / Hayashi, Hidechito / Kinoshita, Tomoyuki / Murayama, Masaru / Kondou, Shigeki / Yamaguchi, Hidetsugu
Issue Date: Jan-2001
Citation: 長崎大学工学部研究報告 Vol.31(56) p.43-48, 2001
Abstract: Noise generated by a fan consists of the discrete frequency noise (DFN) and the turbulent noise. When the jet fan operates near the design point, the former is dominantly. The DFN consists of the noise due to rotation of the steady pressure field on the impeller blades and the noise due to the interaction of the impeller blades and the stator (strut). The rate of decay of the rotating pressure field noise is predictable and in the most cases the quickly decreases in proportion the distance from the rotor. Therefore, DFN observed away from the jet fan is mostly interaction noise which due to interact rotor-strut and rotor-distorted flow incoming the rotor
URI: http://hdl.handle.net/10069/5133
ISSN: 02860902
Type: Departmental Bulletin Paper
Appears in Collections:Volume 31, No. 56

Citable URI : http://hdl.handle.net/10069/5133

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