Tip-Leakage Flow: a Detailed Simulation with a Zonal Approach

Jérôme Boudet (1) , Bo Li (1) , Joëlle Caro (1) , Emmanuel Jondeau (1) , Marc C. Jacob (1, 2)

1 LMFA - Laboratoire de Mecanique des Fluides et d'Acoustique
2 DAEP - Département Aérodynamique Energétique et Propulsion

The secondary flow generated by the clearance between an isolated airfoil tip and anend-plate is analyzed by means of a zonal large-eddy simulation, in comparison with avail-able experimental data. The flow around the tip clearance is described with full large-eddysimulation, while Reynolds-averaged Navier-Stokes is employed in the rest of the compu-tational domain in order to limit computational cost. The various analyses of the flowcharacteristics (mean velocities, Reynolds stresses, spectra) show a very good agreementbetween the experiment and the simulation. Looking at the mean velocities, an intensetip-leakage vortex is observed on the suction side. The Reynolds stresses are used toevaluate the anisotropy of the vortex. Finally, the spectral content is investigated in thenear-field and the far-field, and the leakage flow is shown to be characterized by a dominantcontribution in the range [0.7 kHz; 7 kH z].

Mots clés: Tip-Leakage; LES; Zonal simulation; Turbulence; Tip-Leakage

Domaines: Acoustique [physics.class-ph]

Jérôme Boudet, Bo Li, Joëlle Caro, Emmanuel Jondeau, Marc C. Jacob. Tip-Leakage Flow: a Detailed Simulation with a Zonal Approach. 22nd AIAA/CEAS Aeroacoustics Conference, May 2016, Lyon, France. pp.1-11. ⟨hal-02177963⟩