Identification of Tip-Leakage Vortex Wandering in Large-Eddy Simulation of the ECL5/CATANA Transonic Fan Stage

A. Beurville, Valentin Caries, J. Boudet, V. Clair, A. Giauque
March, 2025
Source Document DOI
LES of the ECL5/CATANA transonic fan: tracking the wandering tip-leakage vortex.

Abstract

A large-eddy simulation (LES) of the open ECL5/CATANA transonic fan/OGV stage is used to study its unsteady tip-leakage flow, which drives aerodynamic efficiency, stability and broadband noise. After validation against experiments, the pressure-fluctuation spectra reveal an unexpected low-frequency peak upstream of the rotor, and a dynamic mode decomposition links it to an oscillation of the tip-leakage flow. A purely kinetic vortex-tracking algorithm is developed and validated to follow the tip-leakage vortex trajectory and size — detected up to two rotor chords downstream of the blade leading edge. Frequency-filtered fields reveal a complex “wandering” motion of the vortex and its interaction with the surrounding flow.

Type
Conference paper
Publication
16th European Turbomachinery Conference (ETC16), Hannover, Germany
Tip-Leakage Flow Large Eddy Simulation Transonic Fan ECL5/CATANA Vortex Tracking Aeroacoustics
Valentin Caries
Valentin Caries
Research Engineer @ IFPEN · PhD · Scientific Python | CFD | Simulation

I build fast, reliable scientific software for fluid mechanics — from CFD and reduced-order models to data pipelines and machine-learning surrogates.