To meet requirements on more cost effective aeronautical products with enhanced capabilities and a reduced environmental footprint, improved simulation techniques are needed. With improved flow simulation techniques accurate predictions of complex unsteady fluid flows, such as separated flows which e.g. can generate noise, leading to engine disturbances and structural fatigue , can be made. Hybrid RANS (Reynolds-Average Navier Stokes)-LES (Large-Eddy Simulation) techniques are considered to be sufficiently accurate and computationally affordable for the aeronautical industry and will be explored and developed for industrial needs in this project. Industrially adapted hybrid RANS-LES modelling (HRLM) techniques thus have the potential to improve product quality, five a more efficient design process with shorter time-to-market for new products and products with a reduced environmental impact. Moreover, HRLM techniques have a great potential to
complement or replace wind tunnel and flight tests.There are however improvements needed to adapt these methods for general industria geometries and flow conditions before being considered as the new state-of-art industrial design tool. The proposed project will focus on the development of RANS-LES interface methodologies, numerical methods adapted for hybrid RANS-LES models in an industrial environment and methods for generating synthetic turbulence in the RANS-LES interface region to give a rapid and accurate transition from RANS to LES. The outcome of the project will be scientific publications as well as establishing a new industrial standard and best practice for turbulence modelling.