Wind generating set and turbulence intensity control method

Abstract

The invention relates to the technical field of wind power generation, and discloses a wind generating set and a turbulence intensity control method. The rectifying part is arranged on the downstream side of the upstream impeller, so that the inner wall of the rectifying part and the outer wall of the cabin are enclosed to form the duct, and the circulation sectional area of the duct is gradually reduced in the airflow direction. According to a continuity equation and a Bernoulli principle, air flow can be gradually accelerated in the process of flowing through the duct, high-speed jet flow is formed in the tail area of the duct, and an acceleration area is formed. When the phases of the velocity gradient tensor and the Reynolds stress tensor in the acceleration region meet specific conditions, for example, the velocity gradient direction is opposite to the Reynolds stress direction, the turbulent energy generation item is presented as a negative value, the turbulent pulsation kinetic energy can be converted into the average flow kinetic energy, reverse energy transmission of the turbulent energy is triggered, and the turbulent energy generation efficiency is improved. And the scale splitting process of the turbulence vortex can be weakened, the turbulence pulsation intensity can be reduced, stable and ordered airflow can be conveyed to the downstream, and therefore the capture efficiency of downstream side wind energy is improved.

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