Numerical identification of mechanisms triggering 2D choke flutter in transonic fan

Rendu, Quentin; Aubert, Stéphane; Ferrand, Pascal

doi:10.1016/j.jfluidstructs.2020.102879

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…In this context, a new open-test-case fan stage named ECL5 has been developed at Ecole Centrale de Lyon (Brandstetter et al, 2021). In parallel, the preliminary design has been used to develop flutter investigation methods (Duquesne et al (2019b) and Rendu et al (2020)). This open-test-case is provided to the turbomachinery community within the European CleanSky-2 project CATANA (Composite Aeroelastics and Aeroacoustics).…”

Section: Introductionmentioning

confidence: 99%

UHBR Open-test-case fan ECL5/Catana, Part 2: Mechanical and aeroelastic stability analysis

Pagès,

Duquesne,

Ottavy

et al. 2021

European Conference on Turbomachinery Fluid Dynamics and Thermodynamics

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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 epoxy composite 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.

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Section: Introductionmentioning

confidence: 99%

UHBR Open-test-case fan ECL5/Catana, Part 2: Mechanical and aeroelastic stability analysis

Pagès,

Duquesne,

Ottavy

et al. 2021

European Conference on Turbomachinery Fluid Dynamics and Thermodynamics

View full text Add to dashboard Cite

show abstract

“…However, the UHBR low-speed fan technology will also be more susceptible to stalldriven instability as the compressor is operated predominantly on the flat part of the characteristic curves [8]. Regarding the same UHBR fan, Rendu et al [9] proposed a linear decomposition method to investigate the physical mechanisms of choke flutter. Using this decomposition analysis approach, the aeroelastic characteristics of the UHBR fan at choke flutter condition are found to be driven by regressive waves generated by the vibration of the blade downstream section.…”

Section: Introductionmentioning

confidence: 99%

A spatial–temporal analysis approach for flutter predictions using decoupled and fully-coupled methods

Phan

2021

Journal of Fluids and Structures

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Dynamic Meta-Modeling Method to Assess Stochastic Flutter Behavior in Turbomachinery

Wang¹,

Song²,

Bai³

2022

Computer Modeling in Engineering &Amp; Sciences

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Numerical identification of mechanisms triggering 2D choke flutter in transonic fan

Cited by 3 publications

References 14 publications

UHBR Open-test-case fan ECL5/Catana, Part 2: Mechanical and aeroelastic stability analysis

UHBR Open-test-case fan ECL5/Catana, Part 2: Mechanical and aeroelastic stability analysis

A spatial–temporal analysis approach for flutter predictions using decoupled and fully-coupled methods

Dynamic Meta-Modeling Method to Assess Stochastic Flutter Behavior in Turbomachinery

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