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Publications [#319915] of Kenneth C. Hall

Papers Published

  1. Clark, WS; Hall, KC, A numerical model of the onset of stall flutter in cascades, Proceedings of the Asme Turbo Expo, vol. 5 (January, 1995), ASME, ISBN 9780791878828 [doi]
    (last updated on 2023/06/01)

    Abstract:
    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.