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Memorias de investigación
Artículos en revistas:
Quantification of the Influence of Unsteady Aerodynamic Loading on the Damping Characteristics of Airfoils Oscillating at Low Reduced Frequency. Part I: Theoretical Support
Año:2017
Áreas de investigación
  • Turbomaquinaria
Datos
Descripción
The effect of the unsteady aerodynamic loading of oscillating airfoils in the low-reduced frequency regime on the work per cycle curves is investigated. The theoretical analysis is based on a perturbation analysis of the linearized Navier?Stokes equations for real modes at low-reduced frequency. It was discovered that a new parameter, the unsteady loading, plays an essential role in the trends of the phase and modulus of the unsteady pressure caused by the airfoil oscillation. Here, the theory is extended in order to quan- tify this new parameter. It is shown that this parameter depends solely on the steady flow- field on the airfoil surface and the vibration mode-shape. As a consequence, the effect of changing the design operating conditions or the vibration mode onto the work-per-cycle curves (and therefore in the stability) can be easily predicted and, what is more impor- tant, quantified without conducting additional flutter analysis. The relevance of the parameter has been numerically confirmed in the Part II of the paper.
Internacional
Si
JCR del ISI
Si
Título de la revista
Journal of Turbomachinery
ISSN
0889-504X
Factor de impacto JCR
0,93
Información de impacto
Volumen
139
DOI
10.1115/1.4034976
Número de revista
Desde la página
031009-1
Hasta la página
031009-8
Mes
MARZO
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Roque Corral Garcia (UPM)
  • Autor: Almudena Vega Coso (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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