| タイトル | Turbulent noise generated by a jet fan |
| その他のタイトル | ジェットファンによって発生した乱流騒音 |
| 著者（日） | 児玉 好雄; 林 秀千人; 村山 将; 近藤 重樹; 山口 英告; 石田 清輝 |
| 著者（英） | Kodama, Yoshio; Hayashi, Hidechito; Murayama, Masaru; Kondo, Shigeki; Yamaguchi, Hidenori; Ishida, Seiki |
| 著者所属（日） | 長崎大学 工学部 機械システム工学科; 長崎大学 工学部 機械システム工学科; 松下エコシステムズ; 松下エコシステムズ; 松下エコシステムズ; 長崎大学 大学院生産科学研究科 |
| 著者所属（英） | Nagasaki University Department of Mechanical Systems Engineering, Faculty of Engineering; Nagasaki University Department of Mechanical Systems Engineering, Faculty of Engineering; Matsushita Ecology Systems Co. Ltd.; Matsushita Ecology Systems Co. Ltd.; Matsushita Ecology Systems Co. Ltd.; Nagasaki University Graduate School of Science and Technology |
| 発行日 | 2004-01 |
| 刊行物名 | Reports of the Faculty of Engineering, Nagasaki University
長崎大学工学部研究報告 |
| 巻 | 34 |
| 号 | 62 |
| 開始ページ | 9 |
| 終了ページ | 17 |
| 刊行年月日 | 2004-01 |
| 言語 | eng |
| 抄録 | There are two mechanisms giving rise to the dipole-type radiation of the turbulent noise generated from Jet fan. One is the strong turbulence induced by a front rotor which flows into the rear rotor, which in turn, random force fluctuation on a rear rotor blade. Another is shedding of vortices from the trailing edge of the both front and rear rotors. In this paper, these two mechanisms are taken into consideration to theoretically estimate the turbulent noise level. The estimated values agree well with the measured levels of turbulent noise generated by the Jet fan. It is theoretically clarified that the noise generated by the rear rotor is higher than that from the front rotor. The noise due to the turbulent flow is higher than that due to the vortex shedding from the trailing edge of the rotor. |
| キーワード | jet fan; aerodynamic characteristic; turbulent noise; vortex; turbulent wake; rotor blade; ジェットファン; 空力特性; 乱流騒音; 渦; 乱流後流; 回転羽根 |
| 資料種別 | Technical Report |
| ISSN | 0286-0902 |
| SHI-NO | AA0046696002 |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/40439 |
