A nonlinear response analysis of a typical airfoil section with control surface freeplay excited by periodic gust loads in low subsonic flow is presented along with a companion wind-tunnel test program. The analytical model uses Peters's finite state model for the two-dimensional aerodynamic flow over the airfoil (Peters, D. A., 'Finite-State Airloads for Deformable Airfoils on Fixed and Rotating Wings:' Symposium on Aeroelasticity and Fluid/Structure Interaction, American Society of Mechanical Engineers, Winter Annual Meeting, Nov. 1994, rev. 3, May 1996). Results for a single harmonic gust and a continuous frequency sweep gust have been computed and measured for flow velocities below the flutter speed. A theoretical and experimental chaotic response phenomenon for the nonlinear structural model was observed. These results further confirm some conclusions about limit cycle oscillations and complement earlier theoretical and experimental studies of self-excited oscillations. The experimental investigation has been carried out in the Duke University wind tunnel using a rotating slotted cylinder gust generator. The fair to good quantitative agreement between theory and experiment verifies that the present analytical approach has reasonable accuracy and good computational efficiency for nonlinear gust response analysis in the time domain.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Nonlinear response of airfoil section with control surface freeplay to gust loads


    Additional title:

    Nichtlineare Schwingungsantwort einer Tragfläche mit Steuerklappe bei Belastung durch Windstöße


    Contributors:
    Tang, D. (author) / Kholodar, D. (author) / Dowell, E.H. (author)

    Published in:

    AIAA Journal ; 38 , 9 ; 1543-1557


    Publication date :

    2000


    Size :

    15 Seiten, 26 Bilder, 1 Tabelle, 11 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Nonlinear Response of Airfoil Section with Control Surface Freeplay to Gust Loads

    Deman Tang / Denis Kholodar / Earl H. Dowell | AIAA | 2000



    Nonlinear Aeroelastic Response of a Typical Airfoil Section with Control Surface Freeplay

    Dowell, E. / Kholodar, D. / Tang, D. et al. | British Library Conference Proceedings | 2000



    Nonlinear aeroelasticity of an airfoil with control surface freeplay

    Conner, M. / Tang, D. / Dowell, E. et al. | AIAA | 1997