Descrizione del progetto
Attenuare il rumore nei motori ad altissimo rapporto di diluizione
Il rapporto di diluizione costituisce uno degli indicatori principali dell’efficienza del motore della turboventola. I motori ad altissimo rapporto di diluizione (UHBR, Ultra-High Bypass Ratio) sono provvisti di grandi ventole che girano a velocità relativamente basse e quindi con un minor consumo di combustibile. Sebbene alti rapporti di diluizione producano una minore rumorosità del getto e della ventola, il rumore del nucleo del motore aumenta. Il progetto CIRRUS, finanziato dall’UE, combinerà simulazioni numeriche e attività sperimentali per diminuire il rumore del nucleo del motore per i futuri motori di turboventole UHBR 2030+. Un’altra parte del lavoro sarà dedicata alla realizzazione di rivestimenti acustici creati da compositi a matrice ceramica. I concetti a basso rumore proposti saranno collaudati all’interno di motori reali. Le misurazioni sperimentali saranno confrontate con quelle teoriche per far sì che le tecnologie proposte raggiungano un elevato livello di maturità (livello 6 di maturità tecnologica).
Obiettivo
The propulsion of the majority of commercial aircraft relies on turbofan engines. The current trend for future turbofan engines is towards even higher bypass ratios. These Ultra-High Bypass Ratio (UHBR) engines have large fans rotating at relatively low speeds. As a consequence of the lower speed, the fuel consumption can be reduced. Another consequence is that the engine noise signature is modified. While jet noise and fan noise will be reduced, core noise will be become more significant. In this context, the CIRRUS project aims to validate advanced low noise concepts, by developing both advanced numerical and experimental tools, to reduce the core noise of future UHBR 2030+ turbofan engines.
The overall goals of CIRRUS are to:
• Improve numerical methods to predict the noise source mechanisms and the acoustic core noise radiation,
• Improve experimental methods to measure the contribution of core noise on real engines,
• Develop, test and integration of new generations of noise reduction acoustic liners made of Ceramic Matrix Composites (CMC),
• Investigate on future UHBR 2030+ architectures the influence on the core noise sources by comparing various configurations of turbines by reducing the number of stages.
The first stream of the project is dedicated to the improvement of the core noise prediction tools with the implementation of an industrial LES/CAA workflow. A second stream is focused on experimental activities with the development of post-processing methodologies to identify the core noise contribution. The third stream of the project is focused on low noise concepts. CMC liner concepts will be investigated and tested. Finally, the relevant low noise concepts will be evaluated on a full scale UHBR and a core noise experimental data base will be created by conducting acoustic test campaigns on realistic engines. A comparison between measurements and simulation results will be performed to qualify the numerical means up to TRL6.
Campo scientifico
- engineering and technologymaterials engineeringcomposites
- engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaircraft
- natural sciencesphysical sciencesacoustics
- engineering and technologyenvironmental engineeringenergy and fuels
- natural sciencesmathematicsapplied mathematicsnumerical analysis
Parole chiave
Programma(i)
Meccanismo di finanziamento
IA - Innovation actionCoordinatore
69131 Ecully
Francia
L’organizzazione si è definita una PMI (piccola e media impresa) al momento della firma dell’accordo di sovvenzione.