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MESSIAEN - Methods
for Efficient SimulationS of Aircraft Engine Noise |
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The MESSIAEN project
focuses on the development of a new methodology for
the simulation of noise generated by turbomachines found
in aircraft and, thereafter, on the design of devices
effecting a reduction of the critical noise source.
To enlarge the scope of the project while maintaining
the focus on a unified set of methods and tools, MESSIAEN
investigates three distinct problems:
- Aero-engines with an eye on the specific needs and challenges of the engine manufacturer (Rolls-Royce), the nacelle manufacturer (Aermacchi) and the aircraft manufacturer (Airbus);
- Helicopter engines (Turbomeca);
- Air conditioning pack noise (LTS).
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Start date |
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Duration |
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30 months |
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EC Program Ref.: |
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6th FP |
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| MESSIAEN tackles tonal (as opposed
to broadband) sources of noise because the relevant
theoretical models will have reached a sufficient level
of maturity to support industrial processes at the end
of the project. |
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MESSIAEN focuses on the solution
of linearised Euler equations by discontinuous Galerkin
method (DGM) on structured grids. This method, modelling
the near field of the source, will be coupled with the
Ffowcs-Willians and Hawkings integral method to predict
the far-field acoustic pressure. The following topics
will also be addressed:
- Parallel processing for tackling real industrial challenges, i. e. three-dimensional configurations over a representative frequency range in a CPU time compatible with industrial constraints;
- Non-reflecting boundary conditions will be used to minimize the acoustic waves reflected when disturbances leave the computational domain;
- Stability issues of the Linearised Euler equations in the presence of strong shear will be assessed;
- Effective modelling techniques for including impedance boundary conditions (liners) in time-domain solution schemes will be further developed;
- Techniques for extracting aero-acoustic source terms from CFD results will be enhanced.
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Though not a sequel of AROMA,
MESSIAEN nevertheless builds upon the success of this FP5
project by tackling more general and more realistic problems.
To that end, key partners of AROMA (Free Field Technologies,
Liebherr Aerospace Toulouse, Turbomeca) have joined forces
with new industrial partners (Rolls-Royce, Airbus, Aermacchi),
reputed Research groups (ISVR, TUE, UCL) and innovative SMEs
(Vibratec, ØDS), to create a rich and coherent consortium.
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