Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
The Low Reduced Frequency Limit of Vibrating Airfoils. Part IIIb: Numerical Quantification and Influence of Unsteady Loading
Year:2015
Research Areas
  • Aeroacustics and vibrations,
  • Turbomachinery
Information
Abstract
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.
International
Si
Congress
ASME Turbo Expo 2016: Turbine Technical Conference and Exposition
960
Place
Seúl, Corea del Sur
Reviewers
Si
ISBN/ISSN
978-0-7918-4984-2
Start Date
13/06/2016
End Date
17/06/2016
From page
176
To page
190
ASME Proceedings | Aerodynamic Excitation and Damping
Participants
  • Autor: Almudena Vega Coso (UPM)
  • Autor: Roque Corral Garcia (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Mecánica de Fluidos y Propulsión Aeroespacial
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)