ファンエンジン排気ノズルの形状変化による騒音低減の研究

Material type: 文書・図像類

Author: 武田, 克己ほか

Publisher: 航空宇宙技術研究所

Publication date: 1983-07

Material Format: Digital

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Note (General)：: The combination of a circular fan/elliptic core nozzle was tested and compared with the results of a conventional circular core/circular fan nozzle un...

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Material Type: 文書・図像類
Title: ファンエンジン排気ノズルの形状変化による騒音低減の研究
Author/Editor: 武田, 克己
西脇, 英夫
TAKEDA, Katsumi
NISHIWAKI, Hideo
Author Heading: 武田, 克己
西脇, 英夫
TAKEDA, Katsumi
NISHIWAKI, Hideo
Publication, Distribution, etc.: 航空宇宙技術研究所
Publication Date: 1983-07
Publication Date (W3CDTF): 1983-07
Alternative Title: Suppression of Peak Noise by Reshaping Coaxial Flow Circumferentially under Static Conditions
Periodical title: 航空宇宙技術研究所報告 = Technical Report of National Aerospace Laboratory TR-770
No. or year of volume/issue: 770
Volume: 770
Pages: 11-
ISSN (Periodical Title): ISSN : 0389-4010
Text Language Code: jpn
Target Audience: 一般
Note (General): The combination of a circular fan/elliptic core nozzle was tested and compared with the results of a conventional circular core/circular fan nozzle under static flow conditions. The results show that there occurred a change of the directiveness of jet noize around the nozzle when using the circular/elliptic nozzle combination. In a 30～50deg direction from the jet axis, a 3～5 dB reduction was observed. We measured radial velocity distribution by using LDV and axial sound source distribution by the polar correlation method in an anechoic room. Based on these measurments we discuss, in this paper, the relation between sound pressure generation and velocity distribution around the exhaust nozzle. We recommend herein a circular/elliptic nozzle combination for turbo-fan engine exhaust nozzle.
資料番号: NALTR0770000
レポート番号: NAL TR-770
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