The chordwise, unsteady pressure difference field for harmonically oscillating airfoils operating in the attached flow, light dynamic stall, and deep dynamic stall regimes has been modally decomposed to identify well-defined modal structures that persist across a vast parameter space of pitching parameters (i.e., reduced frequency, mean angle of attack, and oscillation amplitude). The pressure difference fields were acquired at a chord Reynolds number and Mach number of R e c = 1.12 × 10 6 and M = 0.2 , respectively, demonstrating results applicable to rotorcraft flight conditions. Notably, only four mode shapes were required to reconstruct the aerodynamic loads anywhere within the parameter space. Likewise, the same mode shapes showed a remarkable ability to reconstruct the aerodynamic loads of other (non-native) airfoil geometries with a similar precision. The parametric modal decomposition outlined provides a foundation to elucidate the physics of the dynamic stall phenomenon as well as reduced-order modeling techniques for the aerodynamic loading.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Parametric Modal Decomposition of Dynamic Stall


    Contributors:

    Published in:

    AIAA Journal ; 57 , 1 ; 176-190


    Publication date :

    2018-11-24


    Size :

    15 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Modal Decomposition of Dynamic Stall for Helicopter Blade Section

    Wen, Guangwei / Gross, Andreas | AIAA | 2019



    Analysis of Dynamic Stall using Dynamic Mode Decomposition Technique

    Mariappan, Sathesh / Gardner, Anthony / Richter, Kai et al. | AIAA | 2013


    Analysis of Dynamic Stall Using Dynamic Mode Decomposition Technique

    Mariappan, Sathesh / Gardner, A. D. / Richter, Kai et al. | AIAA | 2014


    Analysis of Dynamic Stall using Dynamic Mode Decomposition Technique

    Mariappan, S. / Gardner, A. / Richter, K. et al. | British Library Conference Proceedings | 2013