Development of Smart Control Experiment System for Offshore Wind Turbine Blades and Analysis of Control Effect

With the development of large-scale wind turbines, the blade trailing edge flap control technology, as an effective means of active control of the blade flow field, can effectively, quickly, and flexibly reduce the blade load and improve the reliability of wind turbines, especially for the large scale. The technology has been widely concerned at home and abroad. To further understand the actual effect of blade flaps and the load control mechanism, based on a large number of numerical simulation calculations, we need to further develop the wind tunnel experiment of model wind turbines with flap control. Based on the scaled law, this paper introduces the criteria of similarity conditions of the blade spanwise circulation and the Polar line distribution. Designs the NREL 5 MW wind turbine blades with a 1 : 105 reduction ratio. According to the BEM theory, the aerodynamic performance of the blade with flaps is optimized, and finally, the design plan of the wind turbine blades with flap control is determined. Finally, the performance of the model wind turbine with flap control is calculated using the aeroelastic coupling simulation computing platform to determine the ideal experimental operating conditions and the corresponding load reduction effect. The work carried out in this paper can not only provide new ideas for the design of the blade reduction ratio but also provide an effective reference for the realization of the flap control system in the large-scale wind turbine blade.