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Memorias de investigación
Ponencias en congresos:
The Low Reduced Frequency Limit of Vibrating Airfoils. Part IIIb: Numerical Quantification and Influence of Unsteady Loading
Año:2015
Áreas de investigación
  • Aeroacústica y vibraciones,
  • Turbomaquinaria
Datos
Descripción
This paper studies the unsteady aerodynamics of vibrating air- foils 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), theo- retically 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 flow- field. 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 character- istics of different airfoils.
Internacional
Si
Nombre congreso
ASME Turbo Expo 2016: Turbine Technical Conference and Exposition
Tipo de participación
960
Lugar del congreso
Seúl, Corea del Sur
Revisores
Si
ISBN o ISSN
978-0-7918-4984-2
DOI
Fecha inicio congreso
13/06/2016
Fecha fin congreso
17/06/2016
Desde la página
176
Hasta la página
190
Título de las actas
ASME Proceedings | Aerodynamic Excitation and Damping
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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