AdvancEd aicRaft-noIse-AlLeviation devIceS using meTamaterials
AERIALIST aims at the disclosure of the potential of metamaterials to envisage innovative devices for the mitigation of the civil aviation noise. Goal of AERIALIST is to contribute to the identification of breakthrough technologies to achieve the noise reduction targets foreseen by the ACARE Flightpath 2050. The focus will be on the reduction of the noise propagating outside turbofan nacelles, exploiting the unconventional properties of acoustic metamaterials to modify noise scattering patterns. Scattering cancellation, hyper-focusing, and noise trapping techniques will be investigated to achieve virtual scarfing of intakes, suitable treatment of outflow ducts and enhancement of shielding effects.
The AERIALIST project will:
- extend the acoustic metamaterial theory to take into account the effect of realistic aerodynamic flows;
- develop suitable numerical methods to simulate the behaviour of acoustic metamaterials in aeronautic operating conditions;
- realize the experimental validation of the most promising concepts;
- analyse the technical feasibility of noise-reductions devices based on the developed concepts, and propose a roadmap towards their practical realization.
WP1 – Management, coordination and disseminationObjectives
The objective of WP1 is the general management of AERIALIST and the coordination of the dissemination activities. WP1 will constantly monitor the progress of the activities, their compliance to the approved schedule, and the fulfillment of the intermediate goals. The work package will also promote and support the dissemination of the project outcomes taking advantage of all the relevant media, in order to reach a potentially interested audience not necessarily confined within the aeronautical community. WP1 will also identify suitable corrective actions, should their need arise, in order to minimize the risk of failure and ensure the achievement of the project goals.Tasks • Task 1.1 – Project coordination and management. • Task 1.2 – Dissemination activities. WP2, Theoretical and numerical modelling Objectives The work package will form the bridge between the state of the art in metamaterials and the methods which are needed to make these materials usable in aeronautical applications. The objectives break down into four principal areas: • development of theory for meta materials in aeroacoustics tailored to aeronautical applications; • development of analytical benchmark problems; • development of tailored numerical methods and multi-disciplinary optimization schemes; • numerical simulation of benchmarks problems and experiments. Tasks • Task 2.1 – Theory for MM modelling in aeroacoustics. • Task 2.2 – Benchmark problems for metamaterials. • Task 2.3 – Numerical modelling of metamaterials. • Task 2.4 – Numerical simulations.
WP3, Metamaterial design and manufacturingObjectives
WP3 will design and manufacture the meta materials to be experimentally tested in AERIALIST. This work package will: • define acoustic test procedures to be used during manufacture and prototyping • develop novel manufacturing procedures, including additive approaches, for metamaterials • manufacture the wind tunnel models for testing of the meta material concepts • prototype various materials including metals, ceramics and polymers for completion of the bench mark concept • manufacture the AERIALIST original concept metamaterials produce guidelines for innovative manufacturing strategies for metamaterials and a roadmap towards certification for the aerospace industry.Tasks • Task 3.1 – Characterization of manufactured meta materials. • Task 3.2 – Design and manufacturing of benchmark device. • Task 3.3 – Design and manufacturing of planar and duct models. • Task 3.4 – Design and manufacturing of AERIALIST original concepts. • Task 3.5 – Realization of experimental models.
WP4, Experimental characterizationObjectives WP4 will concentrate on the design of experimental rig for the planar and duct configurations. It will also focus on Planning of the experimental campaign for the reference benchmark and the AERIALIST original concepts as well as on the post processing of the results for the assessment of analyzed concepts. Tasks • Task 4.1 – Design of experimental rig. • Task 4.2 – Realization of experiments on benchmark concept. • Task 4.3 – Realization of experiments on AERIALIST concepts. • Task 4.4 – Post-processing of results.
WP5, Technical feasibility and realization roadmapObjectives
The final aim of WP5 is the preliminary assessment of the technical feasibility of the analyzed concepts, and the completion of a development roadmap to unlock completely the potential of the technology. The ultimate target is the enhancement of the technology readiness level to values relevant to industry, so to enable the full consideration of the most promising concepts as technologies deserving further investigation and investments.Tasks • Task 5.1 – State-of-the-art survey and benchmark selection • Task 5.2 – Continuous survey of technology advancements • Task 5.3 – Technical feasibility of AERIALIST concepts. • Task 5.4 – Development roadmap to TRL 6.