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タイトル: プロペラファンの翼先端相対流れ場と周期的な空力騒音に関する研究
その他のタイトル: Study of Relative Flow Field in the Blade Tip and Periodical Aerodynamic Noise of a Propeller Fan
著者: 佐々木, 壮一 / 日高, 央也
著者(別表記) : Sasaki, Soichi / Hidaka, Hisanari
発行日: 2015年 7月
出版者: 長崎大学大学院工学研究科 / Graduate School of Engineering, Nagasaki University
引用: 長崎大学大学院工学研究科研究報告, 45(85), pp.35-40; 2015
抄録: In order to clarify the main factor of the periodical aerodynamic noise in the off-design point of the propeller fan, the relative flow field in the blade tip is measured by the hot-wire anemometer with the phase-lock method. In particular, we discuss the influence of the rotational speed of the impeller experimentally for clarifying the relationship between the relative flow field and the periodical aerodynamic noise. When the propeller fan is operated at the off-design point, the periodaical aerodynamic noise is generated in the lower frequency domain than that of the blade passing frequency. The energy of the velocity fluctuation in the leading edge of the blade tip became large at the same frequency band of the periodical aerodynamic noise. We indicated experimentally that the leakage flow at the leading edge in the relative flow did not interfere to the next blade. These experimental results indicate the periodical aerodynamic noise was generated because the pressure fluctuation due to the leakage flow became strong.
キーワード: Fan / Turbomachinery / Tip Vortex / Aerodynamic Noise / Wake / Velocity Distribution
URI: http://hdl.handle.net/10069/35515
ISSN: 18805574
資料タイプ: Departmental Bulletin Paper
原稿種類: publisher
出現コレクション:第45巻 第85号

引用URI : http://hdl.handle.net/10069/35515



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