The European innovation project »ReSiSTant« that started on January 1 st 2018 with a term of four years aims at optimizing two industrial pilot lines by using micro- and nanostructured surfaces for drag reduction. The objectives are to implement new developed surfaces into 1) Aircraft Turbofan Engines and 2) Industrial Compressors. Positive effects by usage of such surface could give benefits in terms of efficiency, CO2 reduction and noise emission and further on a positive economic and ecological impact. Despite the effectiveness of the riblets as passive devices for drag reduction being undoubted, and the mechanism for which this happens having been clearly demonstrated for a couple of decades, a verification of this capability has not been proven to date in full detail, due to the difficulties of the experiments, the lack of the numerical models and mainly the appropriate materials. To enable the usage of such micro- and nanostructures, special development on the surface material for better durability in rough conditions has to be done. It is planned to do nano-functionalization, like implementing nanostructures and nanoparticles for better resistance in rough conditions. Riblets basically consist of tiny streamwise grooved surfaces which reduce the drag in the turbulent boundary layer of up to 8%. Surface modifications such as riblets are the most promising technology that could be applied without additional external energy or additional amount of air. The project aims at developing innovative manufacturing technologies by implementing nanostructures and nanoparticles and it will be assured by two demonstrator lines. During this project, the main efforts for technology advancement will be dedicated to 1) the demonstration of production of large scale high ReSiSTant nano- and microstructured surface on two demonstrators 2) the combination of different process technologies and steps in order to demonstrate the complete fabrication chain for the two selected application demonstrators, and 3) setting-up of an industrial demonstrator in two different fields (industrial compressors and aircraft turbofans).
