Scale Resolved Aeroelastic Simulation Of A Composite Material Transonic Fan

12 Sep 2023

Job Information

Organisation/Company

Ecole Centrale de Lyon

Department

LMFA

Research Field

Engineering

Researcher Profile

First Stage Researcher (R1)

Country

France

Application Deadline

3 Oct 2023 - 12:00 (Europe/Paris)

Type of Contract

Temporary

Job Status

Full-time

Hours Per Week

35

Offer Starting Date

1 Dec 2023

Is the job funded through the EU Research Framework Programme?

Not funded by an EU programme

Is the Job related to staff position within a Research Infrastructure?

No

Offer Description

The transition to climate-neutrality places huge technological challenges on turbomachines, used in aviation propulsion systems. One of the major challenges and current design constraints is the optimisation of flexible rotor blades under high aerodynamic loads. When subject to complex fluid- dynamic forces, rotor blades deform statically and dynamically. This aeroelastic interaction can ultimately cause component failure. The current engineering solution relies on application of generous safety margins and over-designed rotor blades, increasing overall weight and fuel consumption. Intentional aeroelastic design would enable a step-change in technology but is beyond the realms of possibility with existing methods. This is primarily due to a lack of accurate and fast aeroelastic prediction methods and significant gaps in understanding of fluid-structure interactions in complex turbomachinery systems.

The new chair CONDOR presents a comprehensive research program on aeroelastic instabilities of modern fan and compressor architectures for civil aircraft between Safran Aircraft Engines and Ecole Centrale de Lyon, focused on architectures with Ultra-High-Bypass-Ratio.

To investigate different types of aeroelastic interactions, the composite material fan stage ECL5 has been designed and experimentally tested. The investigations have shown significant aeroelastic interactions with safety critical amplitudes at highly loaded conditions. Simulations of these conditions is extremely challenging and requires advanced numerical methods. For the configuration of interest, LES simulations have been recently realized at part speed conditions and received attention of the research community. With the proven feasibility of LES simulations, it is envisaged to extend the capability to incorporate structure-dynamic coupling. Successful realization of a coupled-high-fidelity simulation would provide a step change to aeroelastic turbomachinery research. The goal of the proposed Thesis is to achieve a successful coupled LES-Fluid-structure interaction simulation of the configuration ECL5 at part-speed conditions.

The work will encompass the following steps:

Based on work from a preceding thesis with purely aerodynamic and aeroacoustic focus, a numerical setup will be developed to incorporate structure-dynamic coupling using the Solver AVBP developed by Cerfacs.

A sensitivity analysis will be carried out to identify critical parameters concerning mesh-resolution, time-stepping and modal amplitude

Simulations will be carried out for the most-relevant operating condition observed in the experiments

The results will be analysed in direct comparison with experimental data and existing URANS simulations

Coordinated by the chair at Ecole Centrale de Lyon the applicant will work also in close cooperation with Cerfacs and Safran Aircraft Engines, involving regular exchanges. The thesis is anticipated to start in winter 2023, with an overall duration of 36 months. The applicant will be integrated in a workgroup of experienced researchers and technicians in the Turbomachinery group of the Fluid Mechanics and Acoustics Laboratory.

Requirements

Research Field

Engineering

Education Level

Master Degree or equivalent

Skills/Qualifications

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 Field

Computer science

Years of Research Experience

1 - 4

Research Field

Engineering

Years of Research Experience

1 - 4

Research Field

Mathematics

Years of Research Experience

1 - 4

Research Field

Physics

Years of Research Experience

1 - 4

Additional Information

Benefits

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 (< 4 years) a master by research degree or an equivalent diploma.

Selection process

After pre-selection of candidates based on the CV, individual interviews with the thesis directors and the partner institutes will be conducted.

Work Location(s)

Number of offers available

1

Company/Institute

ECOLE CENTRALE DE LYON

Country

France

City

LYON

Postal Code

69130

Street

36 avenue guy de collongue

Geofield

Where to apply

Website

https: // ecolecentraledelyon.recruitee.com/

Contact

State/Province

France

City

Ecully

Website

https:// www. ec-lyon.fr

Street

36, av Guy de Collongue

Postal Code

69130

E-Mail

[email protected]

STATUS: EXPIRED