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Fluid mechanics

Core Expertise
Recognized as a privileged R&D partner of the SAFRAN group, Cenaero’s CFD Multi-Physics group has significant expertise in turbomachinery flow simulations (LP and HP turbines/compressors).
The core expertise of the group relies on elaborating appropriate methodologies and performing flawless complex multi-physics simulations.
Furthermore, participation in major European research programs aiming at the development of the next generation of aircraft engines has contributed to strengthen a reputation of excellence. Additionally to this, grid generation and large-scale turbulence simulations are performed on industrial geometries. The CFD Multi-Physics group has also a solid experience in fluid-structure interaction and aero-acoustics.
Major orientations
The CFD Multi-Physics group is involved in three major research projects.
  • The first one aims at the simulation of complex external aerodynamics, aero-acoustics and fluid-structure interaction problems through the development of Argo, an in-house unstructured finite volume and finite element solver. The backbone of this project is the accurate simulation of turbulent flows for which a LES approach is followed. The solution of aero-acoustics problems relies on an acoustic analogy in which Argo is coupled to a commercial acoustic solver, while the solution of fluid-structure problems is based on a staggered approach in which Argo is coupled to a commercial structural solver.
  • The second project is focused on multi-phase incompressible flow simulations with Argo for tank sloshing applications and with Hea-P, a in-house one-dimensional solver, for heat pipe modeling.
  • Finally, the third project is oriented towards the simulation of turbomachinery flows with the elsA software developed at Onera. Within this project, advanced internal aerodynamics problems related to technological effects (e.g. casing treatments to delay compressor stall, non-axisymmetric platforms to reduce the secondary losses for both compressors and turbines) are studied. Aero-thermal problems are also investigated for the efficient cooling of high pressure turbine blades.
  • A first achievement is the successful application of Argo to large scale problems like the simulation of the turbulent flow with a DES model around a generic fuselage (FAR-Wake EU project) and a landing gear.
  • A second achievement is the good correlation obtained with experimental data for a first aero-acoustic application.
  • A third achievement is the delivery of a production version of Hea-P.
  • Finally, a fourth achievement is the continuous progress reported in the development of a computational chain for technological effects for compressors (VITAL EU project).
Future work
Research is continued in advanced modeling for LES and in the application of Argo with RANS and LES models to industrial problems (FAR-Wake, CESAR, NICETRIP EU projects). Research is also conducted on higher order discontinuous Galerkin discretization schemes for RANS (ADIGMA EU project). Gravity and thermal effects are introduced for heat pipe modeling. Finally, research will be performed to further broaden the application range in turbomachinery flows through the coupling with the optimization tool developed at Cenaero (NEWAC EU project) and considering multi-disciplinary problems.