ALONOCO investigated the aerodynamic wing efficiency and the emitted noise from four different low-noise high-lift concepts of a regional aircraft. The concepts were compared to a baseline configuration and ranked for down-selection. The analysis was based on numerical simulations with high fidelity tools. The aerodynamic calculations were based on steady and unsteady RANS, hybrid RANS/LES calculations at specified conditions up to maximum lift with the CFD solver Edge. Aerodynamic data was supplied to the aero-acoustic analysis for which two different approaches were used and compared.

The proposed technical work was divided in three work packages over one year. The aerodynamic assessment was carried out in WP1, the aero-acoustic analysis in WP2 and the overall synthesis in WP3.

The maximum total budget was estimated to €300,000. The consortium consisted of two Swedish partners, the research organisation FOI being the coordinator, and one university, Chalmers. Both partners are highly capable, well known and very active in national and European collaborative programs related to aerodynamic and aero-acoustic simulations.