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.
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ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition
June 5–8, 1995
Houston, Texas, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-7882-8
PROCEEDINGS PAPER
A Numerical Model of the Onset of Stall Flutter in Cascades Free
William S. Clark,
William S. Clark
Duke University, Durham, NC
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Kenneth C. Hall
Kenneth C. Hall
Duke University, Durham, NC
Search for other works by this author on:
William S. Clark
Duke University, Durham, NC
Kenneth C. Hall
Duke University, Durham, NC
Paper No:
95-GT-377, V005T14A033; 11 pages
Published Online:
February 16, 2015
Citation
Clark, WS, & Hall, KC. "A Numerical Model of the Onset of Stall Flutter in Cascades." Proceedings of the ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition. Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award. Houston, Texas, USA. June 5–8, 1995. V005T14A033. ASME. https://doi.org/10.1115/95-GT-377
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