Experimental Research on the Influence of Blade Variable Flap Angle on the Performance of Tidal Current Turbine

Due to its large reserves, wide distribution and strong regularity, ocean tidal current energy is considered as the most potential and valuable marine energy. Therefore, in order to solve the problems of poor reliability of convective device and low energy capture efficiency of blade in horizontal axis tidal power generator set, a novel variable flap impeller structure is proposed in this paper. In order to improve the reliability of the unit and the energy harvesting efficiency of the impeller, a flap is set at the trailing edge of the blade, and the curvature of the blade is increased through the variable flap structure to enhance the lift of the rotor, so as to increase the power generation of the unit. Through flume experiments, the data of flow velocity, rotor speed and unit power under different variable wing angle are measured, and the influence of variable blade angle on unit power generation efficiency under different flow velocity is studied. The research shows that the variable flap impeller structure can increase the generating efficiency of the unit on the premise of meeting the adaptive two-way flow.