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Memorias de investigación
Capítulo de libro:
The Low Reduced Frequency Limit of Vibrating Airfoils. Part IIIb: Numerical Quantification of the Unsteady Loading Parameter
Año:2015
Áreas de investigación
  • Ingeniería aeronaútica,
  • Aerodinámica,
  • Aeroelástica,
  • Turbomaquinaria
Datos
Descripción
This paper studies the unsteady aerodynamics of vibrating airfoils in the low reduced frequency regime with special emphasis on its impact on the work per cycle curves. Simulations using a frequency domain linearized Navier-Stokes solver have been carried out on rows of a low-pressure turbine airfoil section, the NACA65 section and a flat plate, to show the correlation between the actual value of the unsteady loading parameter (ULP), theoretically derived in Part IIIa, and the flutter characteristics, for different airfoils, operating conditions and mode-shapes. Both, the traveling-wave and influence coefficient formulations of the problem are used in combination to increase the understanding of the ULP influence in different aspects of the unsteady flowfield. It is concluded that, for a blade vibrating in a prescribed motion at design conditions, the ULP can quantitatively predict the effect of loading variations due to changes in the incidence, and also in the mode shape. It is also proved that the unsteady loading parameter can be used to compare the flutter characteristics of different airfoils.
Internacional
Si
DOI
10.1115/GT2016-57288
Edición del Libro
Editorial del Libro
American Society of Mechanical Engineers
ISBN
978-0-7918-4984-2
Serie
Título del Libro
ASME Proceedings | Aerodynamic Excitation and Damping
Desde página
300
Hasta página
312
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Almudena Vega Coso (UPM)
  • Autor: Roque Corral Garcia (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Departamento: Mecánica de Fluidos y Propulsión Aeroespacial
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