HARPOCRATES · Smart phononic crystals for aircraft noise reduction
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2015-12-01 → 2017-11-30
- EU contribution
- €173,076
- Participants
- 1
- Scheme
- MSCA-IF-EF-ST
Lines connect the coordinator with its partners.
Results in brief
Smart phononic crystals for aircraft noise reduction
After the introduction of commercial jets in 1958, aircraft noise pollution has gradually become a major public issue widespread worldwide. Thus, starting from the 60's, noise reduction programs have been introduced with the objective of decreasing the aircraft noise emissions, especially in the vicinity of airports and approach routes. Since then, and in particular over the last 30 years, proper measures and technology innovation allowed individual aircraft to be over 75% less noisy. Nevertheless, the incessant growth of the global air traffic implies that many citizens are still exposed to high noise levels. This means that aircraft noise pollution is and will continue to be a serious environmental problem to deal with in the next years. In this context, HARPOCRATES proposed a new device capable to propitiously alter noise emission spectra exploiting phononic crystals and acoustic metamaterials. The project shed light (via numerical and experimental approaches on scaled and full-scale models) on the possibility of achieving special dynamic properties, such as the opening of frequency band gaps (BGs), i.e. frequencies in which the propagation of elastic waves is inhibited, mode shifting, topological protection, selective frequency filtering, focusing and wave guiding of elastic waves. This may open new avenues for the practical realization of compact, passive and cost-effective devices for wave manipulation.
Data: CORDIS, © European Union
Project objective
Nowadays air transport is a vital means of integration, cohesion and economic development amongst European members. However, due to the incessant growth of the global air traffic, aircraft noise pollution has gradually become a major public issue. Thus, European Union is strongly addressing its aviation industry towards a more competitive and sustainable system. HARPOCRATES perfectly shares this current international trend and aims to develop a new-generation sound insulation system to attenuate aircraft noise emissions, in accordance to the EU noise transport policy which over the coming years will require more and more quiet operating vehicles. HARPOCRATES proposes to achieve such a technological breakthrough manipulating sound waves via phononic crystals (PCs), i.e. artificial materials ideally suited for realizing efficient filters or insulators. In fact, the project intends to exploit PCs to proficiently control elastic waves via the so-called pass bands (PBs) and band gaps (BGs), which permit and inhibit, respectively, the waves to propagate within precise frequency ranges. Specifically, proposal objectives provide the design, optimization and experimental validation of the engineered innovative device, promoting theoretical and experimental evidences capable to move aircraft noise reduction expertise towards new horizons.The fully accomplishment of the project objectives will speed up a technological breakthrough development in the framework of aircraft noise emissions, enhancing and maximizing its contribution to the European knowledge-based economy and society. In addition, HARPOCRATES allows the applicant to fully develop his potential thanks to an ad-hoc specialized and advanced training provided to the candidate in the course of the project. Proposal permits as well to strengthen contact networks of both the researcher and the beneficiary, offering unique opportunities to acquire and transfer new knowledge in an outstanding European working context.
Original text from CORDIS.
Participants
- CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS · ParisCoordinatorFrance
Links
Data: CORDIS, © European Union