Michaël Leborgne

• Senior Researcher at Cenaero

Engine performance, operability and vibration can be drastically affected by inlet flow non-uniformity. Devices that can accurately and flexibly recreate total pressure and swirl distortion cartographies in test environments are required to assess engine-airframe incompatibilities as soon as possible during the design process. This paper presents a...

Next generation aircraft engine configurations, featuring a higher level of engine-airframe integration, are subjected to increased flow distortion levels at the fan inlet. The presence of such non-uniformities should be considered as early as possible in the design cycle, as it can have an impact on the engine performance, operability and vibratio...

Turbomachinery design has become a simulation-driven process, permanently confronted to the dual need to reduce the cycle time and to further integrate complexity and multiple physics. This duality pushes towards high-dimensional design spaces and favours a multisimulation environment that assesses different operating points, different disciplines,...

This paper focuses on the development and exploitation of a multi-disciplinary, optimization-assisted, design methodology for contra-rotating open-rotors. The design procedure relies on a two-step approach. An aero-mechanical optimization is first performed to generate a geometry with good performances over several high-speed points representative...

For several years, Safran has been involved in the design and optimization of contra rotating open rotors. This innovative architecture is known for allowing drastic reduction in fuel burn, but its development is facing complex technological challenges such as acoustics, aerodynamics, and weight penalty due to the mechanical complexity of an Open R...

State-of-the-art turbomachinery design processes rely more and more on the extensive use of numerical simulations. To deal with expensive high-fidelity computations, surrogate-based optimisation (SBO) has become a very interesting approach. In order to cope with industrial cases, the capability to handle variables of a mixed nature appears key. In...

This paper focuses on the development and application of an integrated aero-mechanical design methodology for a new architecture of low-pressure compressor : the so-called Bladed druM, which enables a substantial reduction of the engine mass but at the cost of high vibrational stresses and complex dynamic behaviour. In this study, a novel two-step...

The current research focuses on the aerodynamic design of a centrifugal compressor and the effect of tip tailoring on the aerodynamic impeller efficiency. To this extent a high-fidelity multi-point design optimization process has been developed and exploited on a high pressure ratio transonic impeller. By manipulating the shape of the impeller blad...

Within the frame of the ongoing 7th Framework European Project DREAM, this article presents a synthesis of Cenaero, DLR, and Onera's joint effort to demonstrate the aerodynamic and acoustic optimization potential of a contra-rotating open rotor. Within WP 3.2 led by Snecma, the objective was to maximize the propellers efficiency at top-of-climb con...