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.
Proper orthogonal decomposition technique for transonic unsteady aerodynamic flows
Eine exakte orthogonale Zerlegungstechnik für transsonische instationäre aerodynamische Strömungen
AIAA Journal ; 38 , 10 ; 1853-1862
2000
10 Seiten, 13 Bilder, 34 Quellen
Aufsatz (Zeitschrift)
Englisch
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