UHBR OPEN-TEST CASE FAN ECL5/CATANA: NON-LINEAR ANALYSIS OF NON-SYNCHRONOUS BLADE VIBRATION AT PART-SPEED CONDITIONS - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2022

UHBR OPEN-TEST CASE FAN ECL5/CATANA: NON-LINEAR ANALYSIS OF NON-SYNCHRONOUS BLADE VIBRATION AT PART-SPEED CONDITIONS

Résumé

The onset of non-synchronous-vibrations have been predicted for a composite open-test-case UHBR fan geometry by time-linearized simulations at part-speed conditions. In the current study, time-accurate simulations with harmonic blade oscillations have been conducted to investigate the non-linear behaviour. Results for different operating conditions show the evolution of aeroelastic stability. The lock-in of convected aerodynamic disturbances with structural vibration is analysed for different vibration amplitudes and frequencies. The simulations show the development of multiple wave-numbers, mode scattering and a non-linear dependency on vibration amplitude. The results indicate the possibility of limit-cycle prediction and the necessity of strongly-coupled methods for the assessment of NSV.
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Dates et versions

hal-03800486 , version 1 (06-10-2022)
hal-03800486 , version 2 (27-11-2023)

Identifiants

  • HAL Id : hal-03800486 , version 1

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Anne-Lise Fiquet, Xavier Ottavy, Christoph Brandstetter. UHBR OPEN-TEST CASE FAN ECL5/CATANA: NON-LINEAR ANALYSIS OF NON-SYNCHRONOUS BLADE VIBRATION AT PART-SPEED CONDITIONS. 2022. ⟨hal-03800486v1⟩
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