Wallmodeled LES of the CREATE compressor with labyrinths, designed by Safran Aircraft Engines. Simulation performed by ONERA.

A hybrid curvilinear/Cartesian mesh with 1.46 billion cells is used to simulate the turbulent compressible flow in the 3.5 stage highpressure CREATE compressor. The channel is discretized with structured curvilinear grids, whereas the labyrinth is handled by Cartesian meshes and immersed boundary method (IBM) (10.1016/j.jcp.2021.110240).

The simulation is performed on 656 Intel Broadwell cores and requires 58,000 CPU hours (less than 4 days) to compute a full 360° revolution.

Postprocessing and flow images are made with Cassiopée ( https://cassiopee.onera.fr ).

The Fast solver ( https://fast.onera.fr) is used to run the LES simulation.

Author: Ivan Mary ( ONERA/DAAA, https://www.onera.fr/en/daaa )

00:00 Turbomachinary geometry
00:19 View definitions
00:32 Flow near hub and casing
01:24 Flow in labyrinth
01:34 Midchannel flow
02:31 Credits