UHBR OPEN-TEST-CASE FAN ECL5/CATANA, PART 2: MECHANICAL AND AEROELASTIC STABILITY ANALYSIS

Valdo Pagès (1) , Pierre Duquesne (1) , Xavier Ottavy (1) , Pascal Ferrand (1) , Stéphane Aubert (1) , Laurent Blanc (2) , Christoph Brandstetter (1)

1 LMFA - Laboratoire de Mecanique des Fluides et d'Acoustique
2 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes

In Part-1, the ECL5 open-test-case has been introduced. Details on design methodology, geometry, and aerodynamics of the whole stage have been presented. Part-2 focuses herein on structure dynamics and aeroelastic stability. This paper aims to provide the mechanical and aeroelastic stability characteristics of the fan stage obtained with a state-of-art industrial design process. The fan blades are composed of a laminate made of unidirectional carbon fibres and epoxycomposite plies. Fibre orientations of each ply are parameters which enable to modify the mechanical behaviour with minimal impact on the aerodynamic performance. Details on the structural properties, the manufacturing process and the ply orientations are presented. First mechanical modes of the fan are described and discussed in the context of aeroelastic interactions. Their frequency distribution is validated in terms of synchronous vibration. Aeroelastic stability of the fan is evaluated at representative operating points with a systematic approach. Potential instabilities are observed far from the operating line. Therefore, they do not compromise experimental campaigns.

Mots clés: Fan; Composite; Aeroelastic; Aeroacoustic

Domaines: Mécanique des fluides [physics.class-ph]

Valdo Pagès, Pierre Duquesne, Xavier Ottavy, Pascal Ferrand, Stéphane Aubert, et al.. UHBR OPEN-TEST-CASE FAN ECL5/CATANA, PART 2: MECHANICAL AND AEROELASTIC STABILITY ANALYSIS. 14th European Conference on Turbomachinery Fluid dynamics & Thermodynamics, Apr 2021, Gdansk, Poland. ⟨hal-03257377v2⟩