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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of the Faculty of Engineering, Nagasaki University > Volume 25, No. 45 >


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Title: 翼付き多層円板ファンの乱流騒音に関する研究
Other Titles: On the Turbulent Noise Generated by Bladed Multiple-Disk Fans
Authors: 児玉, 好雄 / 林, 秀千人 / 濱田, 靖夫 / 田中, 清裕
Authors (alternative): Kodama, Yoshio / Hayashi, Hidechito / Hamada, Yasuo / Tanaka, Kiyohiro
Issue Date: Jul-1995
Citation: 長崎大学工学部研究報告 Vol.25(45) p. 87-94, 1995
Abstract: We made an experimental and theoretical investigation on the turbulent noise by bladed multiple-disk fans. In the theory, we assumed that the turbulent noise by these fans was consist of two sources; the turbulent boundary layer on the disk surface and the vortex shedding from the trailing edge of blades. and that these two sources were independent of each other. To estimate the acoustic power due to the later source, we proposed a new method to calculate the wake width D which was an important parameter to control the noise level. The effects of four parameters, such as the span length of the blade, the number of blades, the inner radius of the impeller and the setting angle of the blade, on the turbulent noise were investigated. The agreement between the theoretical and the experimental results was satisfactory.
URI: http://hdl.handle.net/10069/14942
ISSN: 02860902
Type: Departmental Bulletin Paper
Appears in Collections:Volume 25, No. 45

Citable URI : http://hdl.handle.net/10069/14942

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