Observatorio de I+D+i UPM

Memorias de investigación
Book chapters:
A conceptual flutter analysis of a packet of vanes using a mass-spring model
Year:2007
Research Areas
  • Naval engineering
Information
Abstract
The linear aeroelastic stability of a simplified mass-spring model representing the basic dynamics of a sector of N-a airfoils is analyzed. The degree of multiplicity of the eigenvalues of the simplified structural model is N-a - 1 and hence its mode-shapes are not determined in a unique way. The aerodynamic damping strongly depends on the mode shape and hence its accurate determination is essential in order to obtain realistic values of damping. This in-determination is removed when the aerodynamic forces associated to the motion of the airfoils are added or a platform with finite stiffness is considered. In both cases the problem. is not degenerated anymore and the mode-shapes of the system are uniquely determined. It is shown that the expected stabilizing effect due to the packets may be negligible, depending on the relative strength of the aerodynamic forces and the stiffness of the lower platform. It is also shown that, for the most unstable situation, the aeroelastic behaviour of the problem. may be, in first approximation, very similar to that of a continuous ring.
International
Si
Book Edition
0
Book Publishing
AMER SOC MECHANICAL ENGINEERS
ISBN
978-0-7918-4794-7
Series
0
Book title
PROCEEDINGS OF THE ASME TURBO EXPO 2007
From page
599
To page
607
Participants
  • Participante: Roque Corral (Industria de TurboPropulsores S.A.)
  • Autor: Carlos Martel Escobar (UPM)
  • Participante: Juan Manuel Gallardo (Industria de TurboPropulsores S.A.)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Dinámica y estabilidad no lineal en ingeniería aeroespacial
  • Departamento: Fundamentos Matemáticos de la Tecnología Aeronáutica
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
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