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タイトル: 吸音ダクトによる二重反転式軸流送風機の乱流騒音の低減化
その他のタイトル: Reduction of Turbulent Noise Generated from a Counter-Rotating Fan Using a Sound-Absorbing Duct
著者: 児玉, 好雄 / 林, 秀千人 / 三村, 雄次郎
著者(別表記) : Kodama, Yoshio / Hayashi, Hidechito / Mimura, Yujirou
発行日: 1997年 2月25日
出版者: 日本機械学会
引用: 日本機械学會論文集. B編 63(606) p.569-576 1997
抄録: The purpose of this study is to investigate the effects of the length and the arrangement of a sound-absorbing duct on the aerodynamic characteristics and the turbulent noise of a counterrotating fan. Moreover, we performed a theoretical investigation of the turbulent noise reduction in relation to the thickness of sound-absorbing materials and the length of a sound-absorbing duct. The results are summarized as follows. The sound absorbing duct reduces a considerable amount of noise generated from the counter-rotating fan without degrading the aerodynamic characteristics. The sound-absorbing duct set upstream of the fan only reduces the noise radiated to the upstream and has no effect on that radiated to the downstream. The duct set downstream of the fan has an opposite effect. The agreement between predicted and measured values for the noise reduction is satisfactory.
キーワード: Fluid Machine / Fan / Fan Noise / Turbulent Noise / Sound-Absorbing Duct
URI: http://hdl.handle.net/10069/6715
ISSN: 03875016
資料タイプ: Journal Article
原稿種類: publisher
出現コレクション:060 学術雑誌論文

引用URI : http://hdl.handle.net/10069/6715



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