Proper orthogonal decomposition technique for transonic unsteady aerodynamic flows

Journal Article (Academic article)

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. 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 Authors

Cited Authors

  • Hall Kenneth, C; Thomas Jeffrey, P; Dowell Earl, H

Published Date

  • 2000

Published In

  • Aiaa Journal

Volume / Issue

  • 38 / 10

Start / End Page

  • 1853 - 1862