Global stability analysis of attached or separated flows over a NACA0012 airfoil

Asei Tezuka*

*この研究の対応する著者

研究成果: Conference contribution

5 被引用数 (Scopus)

抄録

The stability of a non-parallel flowfield over an airfoil has been investigated by applying a two-dimensional global (non-parallel) linear stability analysis. In this study, Chiba's method, which is a numerical method for the global linear stability analysis, was improved in order to study the stability of the time-averaged flowfield of CFD results. In a laminar separation bubble formed on the airfoil, a sequence of vortices is experimentally observed, which is generated by Kelvin-Helmholtz instability. By applying the stability analysis, we can examine the mode such as an oscillatory phenomenon that is generated by the instability of the flowfield. At higher angles of attack, a separated flow is observed at the leading edge of the airfoil, which corresponds to the stall condition of the airfoil. The results of the global stability analysis at high angles of attack demonstrate the mode which causes the separation at the leading edge of the airfoil. In this paper, the mode of Kelvin-Helmholtz instability and the mode which causes the stall condition of flowfield are presented.

本文言語English
ホスト出版物のタイトルCollection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
出版社American Institute of Aeronautics and Astronautics Inc.
ページ15798-15814
ページ数17
ISBN(印刷版)1563478072, 9781563478079
DOI
出版ステータスPublished - 2006
外部発表はい
イベント44th AIAA Aerospace Sciences Meeting 2006 - Reno, NV, United States
継続期間: 2006 1月 92006 1月 12

出版物シリーズ

名前Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
21

Conference

Conference44th AIAA Aerospace Sciences Meeting 2006
国/地域United States
CityReno, NV
Period06/1/906/1/12

ASJC Scopus subject areas

  • 宇宙惑星科学
  • 航空宇宙工学

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