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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of the Faculty of Engineering, Nagasaki University > Volume 26, No. 46 >


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Title: 二重反転式軸流送風機の乱流騒音に及ぼす吸音ダクトの影響
Other Titles: Effects of absorbing duct on turbulent noise of CR-fan
Authors: 児玉, 好雄 / 林, 秀千人 / 三村, 雄次郎 / 岩崎, 浩史 / 田中, 清裕 / 山口, 英告
Authors (alternative): Kodama, Yoshio / Hayashi, Hidechito / Mimura, Yujirou / Iwasaki, Kohji / Tanaka, Kiyohiro / Yamaguti, Hidetsugku
Issue Date: Jan-1996
Citation: 長崎大学工学部研究報告 Vol.26(46) p. 1-8, 1996
Abstract: We made an experimental and theoretical investigations on turbulent noise reduction of the counter rotating axial flow fan. The fan had the absorbing systems which was consisted of the absorbing duct and iron duct partly. The absorption coefficient of the whole duct system was obtained in consideration of the respective absorption coefficient of the absorbing duct and iron duct. In this paper, it was examined the effects of three parameters, such as the length of absorbing duct, the arrangement of absorbing duct, and the thickness of the absorbing material, on the aerodynamic characteristics and the turbulent noise. Moreover, the comparison between the predicted and the measured values was tried for radiated noise from fan. The agreement between the predicted and measured values was satisfactory.
URI: http://hdl.handle.net/10069/14959
ISSN: 02860902
Type: Departmental Bulletin Paper
Appears in Collections:Volume 26, No. 46

Citable URI : http://hdl.handle.net/10069/14959

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