The Reduction of Cavity Noise at Subsonic Speeds

Material type: 文書・図像類

Author: 武田, 克巳ほか

Publisher: 航空宇宙技術研究所

Publication date: 1990-09

Material Format: Digital

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Note (General)：: It is generally recognized that airframe noise becomes a significant contributor to overall aircraft noise under landing conditions. Airframe noise is...

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Material Type: 文書・図像類
Title: The Reduction of Cavity Noise at Subsonic Speeds
Author/Editor: 武田, 克巳
西脇, 英夫
藤井, 昭一
TAKEDA, Katsumi
NISHIWAKI, Hideo
FUJII, Shoichi
Author Heading: 武田, 克巳
西脇, 英夫
藤井, 昭一
TAKEDA, Katsumi
NISHIWAKI, Hideo
FUJII, Shoichi
Publication, Distribution, etc.: 航空宇宙技術研究所
Publication Date: 1990-09
Publication Date (W3CDTF): 1990-09
Alternative Title: 脚格納空間の騒音低減化の研究
Periodical title: 航空宇宙技術研究所報告 = Technical Report of National Aerospace Laboratory TR-1081
No. or year of volume/issue: 1081
Volume: 1081
Pages: 9-
ISSN (Periodical Title): ISSN : 0389-4010
Text Language Code: eng
Target Audience: 一般
Note (General): It is generally recognized that airframe noise becomes a significant contributor to overall aircraft noise under landing conditions. Airframe noise is considered to be the sound radiated aerodynamically as a result of complex interplay between local flows and cofigurations that intrude or are recessed or deployed over the lifting surfaces and fuselage. The scale model acoustic testing of landing gears done by the authors revealed that the cavity noise was predominant in sound sources of landing device. As the succeeding phase of the test, here we report a study made to determine the sound generation mechaism and to reduce the sound level of the cavity noise. It is observed that an array of fins attached on the leading edge of the cavity offered a reduction of 7～8 dB in the sound pressure levels.
資料番号: NALTR1081000
レポート番号: NAL TR-1081
Access Restrictions: 限定公開
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ