Surrogate-based aeroelastic design optimization of tip extensions on a modern 10 MW wind turbine

Abstract. Advanced aeroelastically optimized tip extensions are among rotor innovation concepts which could contribute to the higher performance and lower cost of wind turbines. A novel design optimization framework for turbine blade based on surrogate aeroelastic modeling is presented. An academic modeled in an code equipped with a near-wake aerodynamic module, complex shapes parametrized using 11 variables. The space explored via full simulations extreme turbulence, model fitted data. Direct performed seeking maximize power retrofitted within ultimate load constraints. presented achieves load-neutral gain up 6 % annual energy production. Its further evaluated detail by means used generation compared higher-fidelity module comprising hybrid filament-particle-mesh vortex method lifting-line implementation. good agreement between solvers obtained at low turbulence levels, while differences predicted flapwise root bending moment grow increasing intensity.