A new method for constructing reduced-order models (ROM) of unsteady small-disturbance flows is presented. The reduced-order models are constructed using basis vectors determined from the proper orthogonal decomposition (POD) of an ensemble of small-disturbance frequency-domain solutions. Each of the individual frequency-domain solutions is computed using an efficient time-linearized flow solver. It is shown that reduced-order models can be constructed using just a handful of POD basis vectors, producing low-order but highly accurate models of the unsteady flow over a wide range of frequencies. The POD/ROM technique is applied to compute the unsteady aerodynamic and aeroelastic behavior of an isolated transonic airfoil and to a two-dimensional cascade of airfoils.


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    Title :

    Proper orthogonal decomposition technique for transonic unsteady aerodynamic flows


    Additional title:

    Eine exakte orthogonale Zerlegungstechnik für transsonische instationäre aerodynamische Strömungen


    Contributors:
    Hall, K.C. (author) / Thomas, J.P. (author) / Dowell, E.H. (author)

    Published in:

    AIAA Journal ; 38 , 10 ; 1853-1862


    Publication date :

    2000


    Size :

    10 Seiten, 13 Bilder, 34 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English