Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Quantification of the Influence of Unsteady Aerodynamic Loading on the Damping Characteristics of Airfoils Oscillating at Low Reduced Frequency. Part I: Theoretical Support
Year:2017
Research Areas
  • Turbomachinery
Information
Abstract
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.
International
Si
JCR
Si
Title
Journal of Turbomachinery
ISBN
0889-504X
Impact factor JCR
0,93
Impact info
Volume
139
10.1115/1.4034976
Journal number
From page
031009-1
To page
031009-8
Month
MARZO
Ranking
Participants
  • Autor: Roque Corral Garcia (UPM)
  • Autor: Almudena Vega Coso (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Mecánica de Fluidos y Propulsión Aeroespacial
S2i 2020 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)