Interaction Mechanisms Between Tip Leakage Flow and the Passage Vortex in a Linear Turbine Rotor Cascade

Material type: 文書・図像類

Author: 山本, 孝正ほか

Publisher: 航空宇宙技術研究所

Publication date: 1988-06

Material Format: Digital

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Note (General)：: タービンの動翼列流路における翼先端すきまからの漏れ流れによる全圧損失の発生メカニズム調べるために、低速の直線翼列内の三次元流を種々の先端すきま寸法及び種々の翼列流入角度(インシデンス)について測定した。翼列の下流の流れ場に及ぼす漏れ流れの影響および漏れ流れと流路渦との相互干渉について、トラバース測定...

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Material Type: 文書・図像類
Title: Interaction Mechanisms Between Tip Leakage Flow and the Passage Vortex in a Linear Turbine Rotor Cascade
Author/Editor: 山本, 孝正
三村, 富嗣雄
YAMAMOTO, Atsumasa
MIMURA, Fujio
Author Heading: 山本, 孝正
三村, 富嗣雄
YAMAMOTO, Atsumasa
MIMURA, Fujio
Publication, Distribution, etc.: 航空宇宙技術研究所
Publication Date: 1988-06
Publication Date (W3CDTF): 1988-06
Periodical title: Technical Report of National Aerospace Laboratory TR-983T
No. or year of volume/issue: 983T
Volume: 983T
Pages: 20-
ISSN (Periodical Title): ISSN : 0389-4010
Text Language Code: eng
Target Audience: 一般
Note (General): タービンの動翼列流路における翼先端すきまからの漏れ流れによる全圧損失の発生メカニズム調べるために、低速の直線翼列内の三次元流を種々の先端すきま寸法及び種々の翼列流入角度(インシデンス)について測定した。翼列の下流の流れ場に及ぼす漏れ流れの影響および漏れ流れと流路渦との相互干渉について、トラバース測定結果および流れの可視化試験結果をもとに、二次流れと全圧損失係数を用いて議論した。また翼端すきな内外の壁近傍流れをマイクロピトー管によりトラバース測定し、翼間で上記干渉がいかに発達するかを明らかにした。さらに、鈍い前縁及び後縁をもつ本報の高転向角翼列の場合につき、全体性能特性を求め、Ainley-Mathieson法による性能予測結果と比較検討した。
In order to study the loss generation mechanisms due to the tip-leakage flow in turbine rotor passage, extensive traverse measurements were made of the three-dimensional flows in a low-speed linear cascade for various tip-clearance sizes and for various cascade inlet flow angles (or incidences). In this paper, effects of the leakage flow on the cascade downstream flow fields and interactions between the leakage flow and the passage vortices are discussed in detail based on the traverse measurements and flow-visualization tests in terms of secondary flows and the associated losses. Other traverses of the tip-casing endwall flows were also performed, both inside and outiside the tip-clearance gap, using a micro five-hole pitot tube to reveal the axial development of the interaction throughout the cascade passage. Overall loss characteristics of the present high-turning cascade with blunt leading- and trailing-edges are obtained and compared with those predicted by the Ainley-Mathieson method.
資料番号: NALTR0983000
レポート番号: NAL TR-983T
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