A numerical model of the onset of stall flutter in cascades

Conference Paper

In this paper, we present a computational fluid dynamic model of the unsteady flow associated with the onset of stall flutter in turbomachinery cascades. The unsteady flow is modeled using the laminar Navier-Stokes equations. We assume that the unsteadiness in the flow is a small harmonic disturbance about the mean or steady flow. Therefore, the unsteady flow is governed by a small-disturbance form of the Navier-Stokes equations. These linear variable coefficient equations are discretized on a deforming computational grid and solved efficiently using a multiple-grid Lax-Wendroff scheme. A number of numerical examples are presented which demonstrate the destabilizing influence of viscosity on the aeroelastic stability of airfoils in cascade, especially for torsional modes of blade vibration.

Full Text

Duke Authors

Cited Authors

  • Clark, WS; Hall, KC

Published Date

  • January 1, 1995

Published In

  • Proceedings of the Asme Turbo Expo

Volume / Issue

  • 5 /

International Standard Book Number 13 (ISBN-13)

  • 9780791878828

Digital Object Identifier (DOI)

  • 10.1115/95-GT-377

Citation Source

  • Scopus