DSpace university logo mark
Advanced Search
Japanese | English 

NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of the Faculty of Engineering, Nagasaki University > Volume 36, No. 67 >


File Description SizeFormat
36_67_02.pdf472.2 kBAdobe PDFView/Open

Title: 多翼ファンの比騒音に関する研究(羽根枚数の影響)
Other Titles: A Study on Specific Noise of Multiblade Fan (Influence on Number of blades)
Authors: 佐々木, 壮一 / 児玉, 好雄 / 林, 秀千人 / 宇都, 太一
Authors (alternative): Sasaki, Soichi / Kodama, Yoshio / Hayashi, Hidechito / Uto, Taichi
Issue Date: Sep-2006
Publisher: 長崎大学工学部
Citation: 長崎大学工学部研究報告 = Reports of the Faculty of Engineering, Nagasaki University vol.36(67) p.6-13 2006
Abstract: Specific noise is a noise for base unit of flow rate and total pressure. It can be applied to estimate the overall characteristic of a fan. In this study, an analytical theory for the specific noise based on internal flow of a multiblade fan is proposed; moreover, the specific noise of the fan having an impeller with a different number of blades was discussed. The total pressure coefficient of the fan having 120 blades (MF120) became lower than the fan having 40 blades (MF40). On the other hand, the noise level of MF120 became 5.8 dB smaller than MF40 because the relative velocity was reduced by the slip. It was estimated by analyzing internal flow that the specific noise of MF120 was 4.3 dB smaller than MF40.
Keywords: Fan / Internal Flow / Aerodynamic Noise / Vortex / Wake
URI: http://hdl.handle.net/10069/4972
ISSN: 18805574
Relational Links: http://www.lb.nagasaki-u.ac.jp/reports/kougaku/preview.php?id=29
Type: Departmental Bulletin Paper
Appears in Collections:Volume 36, No. 67

Citable URI : http://hdl.handle.net/10069/4972

All items in NAOSITE are protected by copyright, with all rights reserved.


Valid XHTML 1.0! Copyright © 2006-2015 Nagasaki University Library - Feedback Powerd by DSpace