Field tests of a highly flexible downwind ultralight rotor to mimic a 13-MW turbine rotor

Abstract Offshore extreme-scale turbines of 20–25 MW in size may offer reduced energy costs. The technical barriers at these extreme scales include escalating blade masses with increased flexibility as well high gravity loads and tower-strike issues. These be addressed a load-aligning downwind turbine. To investigate this type design, field test campaign was conducted an aeroelastically scaled rotor, termed the Segmented Ultralight Morphing Rotor Demonstrator (SUMR-D). tests were on Controls Advanced Research Turbine National Renewable Energy Laboratory. paper gives overviewof experimental diagnostics, results campaign, makes conclusions recommendations regarding highly flexible rotors.