Organisation/Company: Ecole Centrale de Lyon
Research Field: Engineering
Researcher Profile: Recognised Researcher (R2)
Positions: PhD Positions
Country: France
Application Deadline: 31 Mar 2025 - 12:00 (Europe/Paris)
Type of Contract: Temporary
Job Status: Full-time
Hours Per Week: 35
Offer Starting Date: 31 May 2025
Is the job funded through the EU Research Framework Programme? Not funded by a EU programme
Is the Job related to staff position within a Research Infrastructure? No
Offer Description The shift toward climate-neutral aviation poses critical challenges for turbomachines, particularly in optimizing flexible rotor blades under high (unsteady) aerodynamic loads. These blades undergo static and dynamic deformations when exposed to complex fluid-dynamic forces, leading to aeroelastic interactions that can cause component failure. Current approaches rely on generous safety margins which lead to increased weight and fuel consumption.
Intentional aeroelastic design offers promising solutions, but its progress is hindered by a lack of fast and accurate aeroelastic prediction methods, along with gaps in understanding fluid-structure interactions in turbomachinery systems.
The CONDOR chair, a collaboration between Safran Aircraft Engines and École Centrale de Lyon, focuses on aeroelastic instabilities in modern Ultra-High-Bypass-Ratio fan and compressor architectures for civil aircraft. As part of this research, the composite fan stage ECL5 has been developed and tested, revealing significant aeroelastic interactions at high aerodynamic loads. However, simulating these conditions remains highly challenging and requires advanced numerical methods.
The goal of this postdoctoral research is to develop a coupled LES-Fluid-Structure Interaction framework for the ECL5 fan stage under part-speed conditions. Building on the feasibility of recent LES simulations, this project will integrate structural-dynamic coupling to achieve a fully coupled aeroelastic simulation.
Research Plan and Tasks: Mode mapping framework: Establish a method for mapping structural modes, obtained from both experiments and FEM calculations, onto the surface mesh used by the fluid solver (AVBP).
Deformation coupling: Implement and couple the deformation of the surface mesh to the volume nodes within AVBP, ensuring accurate transmission of structural deformation into the fluid domain.
LES validation: Perform simulations of the flow over the ECL5 fan stage at part-speed conditions, and validate the framework by comparing against available experimental data and existing URANS results.
This work will be conducted in close collaboration with Cerfacs, Safran Aircraft Engines, and École Centrale de Lyon, with frequent exchanges between the institutions. The successful candidate will be integrated into the Turbomachinery group within the Laboratoire de Mécanique des Fluides et Acoustique (LMFA) at École Centrale de Lyon.
Qualifications: Proficiency in English and/or French
Solid background in numerical methods and computational fluid dynamics
Excellent communication and teamwork skills
Experience with structural mechanics and turbomachinery aerodynamics are a plus
All work must be conducted in coordination with the research group, requiring excellent communication and teamwork. It is expected that the applicant has a solid background in numerical methods, fluid dynamics, and structural mechanics as well as fundamentals in turbomachinery aerodynamics.
Languages: ENGLISH Level: Excellent
Research Fields: Computer science (Years of Research Experience: 1 - 4)
Engineering (Years of Research Experience: 1 - 4)
Mathematics (Years of Research Experience: 1 - 4)
Physics (Years of Research Experience: 1 - 4)
Additional Information 3 year contract with Ecole Centrale de Lyon
Monthly gross salary 2023: 2,307€
Eligibility Criteria Applicants must be in a position to complete a master by research degree or an equivalent diploma (before the beginning of the PhD position) or have completed ( Selection Process After pre-selection of candidates based on the CV, individual interviews with the thesis directors and the partner institutes will be conducted.
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