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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of the Faculty of Engineering, Nagasaki University > Volume 33, No. 61 >


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Title: 多翼シロッコファンから発生する広帯域騒音に関する研究
Other Titles: A Study of Broad Band Noise Generated form a Multi-Blade Sirocco Fan
Authors: 佐々木, 壮一 / 児玉, 好雄 / 林, 秀千人 / 畠山, 真 / 志賀, 亮太 / 高瀬, 毅
Authors (alternative): Sasaki, Soichi / Kodama, Yoshio / Hayashi, Hidechito / Hatakeyama, Makoto / Shiga, Ryota / Takase, Tsuyoshi
Issue Date: Jul-2003
Citation: 長崎大学工学部研究報告 Vol.33(61) p. 9-15, 2003
Abstract: The basic characteristics of the broad band noise (BBN) generated from a multi-blade sirocco fan are summarized. As a basic experiment of the BBN, the noise characteristics generated from an arc blade were researched in the wind tunnel experiment, and the distributions of the sound sources of the same blade were visualized by a numerical computation. As the sound sources generating at the separation point moved to trailing edge, the scale of the sound sources became large. Moreover, the sound sources were not necessarily uniform scale. The sound pressure generated from the multi-blade sirocco fan was proportional to third power of the flow coefficient, and the BBN in the spectrum distribution was in inverse proportion to third power of the frequency. This tendency of the noise of the fan was same as the noise characteristics of the are blade. In the fan noise of the multi-blade sirocco fan, the influence of the BBN appeared in the flow rate vicinity of the maximum efficiency point.
URI: http://hdl.handle.net/10069/15044
ISSN: 02860902
Type: Departmental Bulletin Paper
Appears in Collections:Volume 33, No. 61

Citable URI : http://hdl.handle.net/10069/15044

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