Stability of periodic oscillation around the trailing edge of NACA0012 airfoil

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    The performance of the NACA0012 airfoil deteriorates with decreasing Reynolds number owing to the flow separation at the trailing edge. In the wake region, an unstable fluctuation with a discrete frequency, known as trailing edge noise, is observed. It has become controversial whether or not the feedback mechanism between the oscillation of the trailing edge separation and the wake oscillation is actually occurring. The flow at low Reynolds number exhibits a periodic oscillation around the trailing edge of the NACA0012 airfoil. In such a case, the structure of the velocity field changes with the phase in a complicated manner. In order to explore problems regarding unsteady aerodynamic phenomena, comprehension of the flowfield structure is necessary. In addition to the experiment and the numerical computation of the Navier-Stokes Equations (CFD), the theoretical approach from the viewpoint of stability analysis will contribute to understanding the mechanism of such problems. For the purpose of discussing the trailing edge noise, this paper studies the stability of the NACA0012 airfoil using the concept of global linear stability analysis.

    Original languageEnglish
    Title of host publication6th AIAA Theoretical Fluid Mechanics Conference
    Publication statusPublished - 2011
    Event6th AIAA Theoretical Fluid Mechanics Conference - Honolulu, HI
    Duration: 2011 Jun 272011 Jun 30

    Other

    Other6th AIAA Theoretical Fluid Mechanics Conference
    CityHonolulu, HI
    Period11/6/2711/6/30

    Fingerprint

    Airfoils
    Reynolds number
    Linear stability analysis
    Flow separation
    Navier Stokes equations
    Aerodynamics
    Computational fluid dynamics
    Feedback
    Experiments

    ASJC Scopus subject areas

    • Fluid Flow and Transfer Processes

    Cite this

    Tezuka, A. (2011). Stability of periodic oscillation around the trailing edge of NACA0012 airfoil. In 6th AIAA Theoretical Fluid Mechanics Conference

    Stability of periodic oscillation around the trailing edge of NACA0012 airfoil. / Tezuka, Asei.

    6th AIAA Theoretical Fluid Mechanics Conference. 2011.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Tezuka, A 2011, Stability of periodic oscillation around the trailing edge of NACA0012 airfoil. in 6th AIAA Theoretical Fluid Mechanics Conference. 6th AIAA Theoretical Fluid Mechanics Conference, Honolulu, HI, 11/6/27.
    Tezuka A. Stability of periodic oscillation around the trailing edge of NACA0012 airfoil. In 6th AIAA Theoretical Fluid Mechanics Conference. 2011
    Tezuka, Asei. / Stability of periodic oscillation around the trailing edge of NACA0012 airfoil. 6th AIAA Theoretical Fluid Mechanics Conference. 2011.
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