振動する翼列の吹下ろしの一計算

Material type: 規格・テクニカルリポート類

Author: 市川, 輝雄ほか

Publisher: 航空宇宙技術研究所

Publication date: 1974-06

Material Format: Digital

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Note (General)：: 出版タイプ： NAAn approximate theory is developed for analysing downwashes behind oscillating two dimensional cascades having an infinite number of blades. ...

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Material Type: 規格・テクニカルリポート類
Title: 振動する翼列の吹下ろしの一計算
Author/Editor: 市川, 輝雄
ICHIKAWA, Teruo
Author Heading: ICHIKAWA, Teruo
Publication, Distribution, etc.: 航空宇宙技術研究所
Publication Date: 1974-06
Publication Date (W3CDTF): 1974
Alternative Title: An Analysis for Downwash behind Oscillating Cascades
Periodical title: 航空宇宙技術研究所報告 = Technical Report of National Aerospace Laboratory TR-373
No. or year of volume/issue: 373
Volume: 373
Pages: 9-
ISSN (Periodical Title): ISSN : 0389-4010
Target Audience: 一般
Note (General): 出版タイプ： NA
An approximate theory is developed for analysing downwashes behind oscillating two dimensional cascades having an infinite number of blades. The calculation procedure is greatly simplified by concentrating bound vortices on the blades other than the reference blade to their quarter chord points and also by assuming that the downwash on the reference blade induced by these concentrated vortices can be represented by its value at the three quarter chord point. It is disclosed that, both in the circulation and the downwash, limiting values when the frequency tends to zero are not equal to steady values and that the downwash becomes substantially a traveling wave of constant amplitude only after a short distance frome the cascade. Circulations and downwashes are calculated for various reduced frequencies and blade spacings. The results show that, both in circulations and downwashes, variations in the real parts against the reduced frequency are small and those in the imaginary parts are approximately linear. Effects of the blade spacing are large in the circulation but are small in the downwash. A ratio of the downwash on a center plane of two adjacent blades to that on a blade plane becomes unity when the frequency or the spacing tends to zero, and decreases when a product of the reduced frequency and the spacing increases.
資料番号: NALTR0373000
レポート番号: NAL TR-373
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