Mechanisms of Endwall/Leakage Flows and the Associated Losses in a Linear Turbine Rotor Cascade with Blade Tip-Clearance

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)：: 本論文では翼先端すきまをもつ直線タービン翼列の翼端壁面近傍で生ずる三次元流れとそれに伴う損失のメカニズムについて議論する。損失メカニズムに及ぼす重要な因子として翼先端すきまの寸法と翼列インシデンス(流入角度)を変えて実験した。翼端壁近傍及び翼端間隙内の流れは頭寸法0.6mmの微小5孔ピトー管を用いて...

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Material Type: 文書・図像類
Title: Mechanisms of Endwall/Leakage Flows and the Associated Losses in a Linear Turbine Rotor Cascade with Blade Tip-Clearance
Author/Editor: 山本, 孝正
YAMAMOTO, Atsumasa
KABA, Katsuyoshi
Author Heading: 山本, 孝正
YAMAMOTO, Atsumasa
KABA, Katsuyoshi
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-985T
No. or year of volume/issue: 985T
Volume: 985T
Pages: 21-
ISSN (Periodical Title): ISSN : 0389-4010
Text Language Code: eng
Target Audience: 一般
Note (General): 本論文では翼先端すきまをもつ直線タービン翼列の翼端壁面近傍で生ずる三次元流れとそれに伴う損失のメカニズムについて議論する。損失メカニズムに及ぼす重要な因子として翼先端すきまの寸法と翼列インシデンス(流入角度)を変えて実験した。翼端壁近傍及び翼端間隙内の流れは頭寸法0.6mmの微小5孔ピトー管を用いて詳細に測定した。その結果,翼端間隙全体にわたり漏れ流れのベクトルや圧力分布など損失メカニズムに関する詳細な情報が得られた。漏れ流れと翼端壁面上の流れとの干渉,それらによる流れの剥離線、損失発生に及ぼす翼端間隙寸法や入口流入角度の影響,さらに,三次元的な翼端壁面流のねじれなどについても議論した。
This paper discusses the mechanisms of three-dimensional flows and of the associated losses occurring in the tip endwall region of a linear turbine cascade with tip-clearance. The clearance gap sizes and the cascade incidences were chosen as the most importnat variables affecting the mechanisms. Flows close to the endwall and inside the clearance were surveyed in great detail using a micro five-hole pitot tube of 0.6mm head size. The results gave very detailed information on the mechanisms, such as leakage flow vectors and pressure distributions throughout the clearance. Interaction of leakage flow with the endwall flow and their associated separation lines, effects of gap size and inlet flow angle on loss generation, and skewness of the three-dimensional endwall flows are also discussed.
資料番号: NALTR0985000
レポート番号: NAL TR-985T
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