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  • 1990-1994  (4)
  • 1985-1989
  • 1991  (4)
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  • 1990-1994  (4)
  • 1985-1989
Year
  • 1
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    Euler flow predictions for an oscillating cascade using a high resolution wave-split scheme (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A compressible flow code that can predict the nonlinear unsteady aerodynamic 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 only harmonic pitching and plunging motions are addressed. 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.
    Keywords: AERODYNAMICS
    Type: ASME PAPER 91-GT-198
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Flutter analysis of cascades using a two dimensional Euler solver (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Flutter analysis of a cascade of blades in compressible flow is presented, with each blade of the cascade modeled as a typical section having pitching and plunging degrees of freedom. The aerodynamic forces are obtained from an unsteady, 2-D cascade solver based on the Euler equations. To reduce the computational time, an influence coefficient technique and a pulse response technique are also used to obtain the unsteady force coefficients for any frequency and phase angle. The predicted steady and unsteady aerodynamic forces for selected cascade geometries and flow conditions correlate well with the available experimental and analytical data.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 91-1681
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 3
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    Euler flow predictions for an oscillating cascade using a high resolution wave-split scheme (1991)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: 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 only harmonic pitching and plunging motions are addressed. 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.
    Keywords: AERODYNAMICS
    Type: NASA-TM-104377 , E-5933 , NAS 1.15:104377 , International Gas Turbine and Aeroengine Congress and Exposition; Jun 03, 1991 - Jun 06, 1991; Orlando, FL; United States
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 4
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    Application of an efficient hybrid scheme for aeroelastic analysis of advanced propellers (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Keywords: AERODYNAMICS
    Type: Journal of Propulsion and Power (ISSN 0748-4658); 7; 767-775
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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