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Euler Flow Predictions for an Oscillating Cascade Using a High Resolution Wave-Split Scheme PUBLIC ACCESS

[+] Author Affiliations
Dennis L. Huff

National Aeronautics and Space Administration, Cleveland, OH

Timothy W. Swafford

Mississippi State University, Mississippi State, MS

T. S. R. Reddy

The University of Toledo, Toledo, OH

Paper No. 91-GT-198, pp. V005T14A032; 8 pages
doi:10.1115/91-GT-198
From:
  • ASME 1991 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; General
  • Orlando, Florida, USA, June 3–6, 1991
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7902-3
  • Copyright © 1991 by ASME

abstract

A compressible flow code that can predict the nonlinear unsteady aerodynamics associated with transonic flows over oscillating cascades is developed and validated. The code solves the two-dimensional, unsteady Euler equations using a time-marching, flux-difference splitting scheme. The unsteady pressures and forces can be determined for arbitrary input motions, although this paper will only address harmonic pitching and plunging motions. The code solves the flow equations on a H-grid which is allowed to deform with the airfoil motion. Predictions are presented for both flat plate cascades and loaded airfoil cascades. Results are compared to flat plate theory and experimental data. Predictions are also presented for several oscillating cascades with strong normal shocks where the pitching amplitudes, cascade geometry and interblade phase angles are varied to investigate nonlinear behavior.

Copyright © 1991 by ASME
This article is only available in the PDF format.

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