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Reduced-order modelling of unsteady small-disturbance flows using a frequency-domain proper orthogonal decomposition technique

Publication ,  Conference
Hall, KC; Thomas, JP; Dowell, EH
Published in: 37th Aerospace Sciences Meeting and Exhibit
January 1, 1999

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. We show 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. In this paper, we apply the POD/ROM technique to compute the unsteady aerodynamic and aeroelastic behavior of an isolated transonic airfoil, and to a two-dimensional cascade of airfoils.

Duke Scholars

Published In

37th Aerospace Sciences Meeting and Exhibit

DOI

Publication Date

January 1, 1999
 

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Hall, K. C., Thomas, J. P., & Dowell, E. H. (1999). Reduced-order modelling of unsteady small-disturbance flows using a frequency-domain proper orthogonal decomposition technique. In 37th Aerospace Sciences Meeting and Exhibit. https://doi.org/10.2514/6.1999-655
Hall, K. C., J. P. Thomas, and E. H. Dowell. “Reduced-order modelling of unsteady small-disturbance flows using a frequency-domain proper orthogonal decomposition technique.” In 37th Aerospace Sciences Meeting and Exhibit, 1999. https://doi.org/10.2514/6.1999-655.
Hall KC, Thomas JP, Dowell EH. Reduced-order modelling of unsteady small-disturbance flows using a frequency-domain proper orthogonal decomposition technique. In: 37th Aerospace Sciences Meeting and Exhibit. 1999.
Hall, K. C., et al. “Reduced-order modelling of unsteady small-disturbance flows using a frequency-domain proper orthogonal decomposition technique.” 37th Aerospace Sciences Meeting and Exhibit, 1999. Scopus, doi:10.2514/6.1999-655.

Published In

37th Aerospace Sciences Meeting and Exhibit

DOI

Publication Date

January 1, 1999