Wind turbine generator system low-wind-speed airfoil section family

Abstract

The invention aims at providing a wind turbine generator system low-wind-speed airfoil section family. The airfoil section family is mainly used for the area with the low wind speed of 5 m/s to 7.5 m/s and is composed of six airfoil sections including the first airfoil section, the second airfoil section, the third airfoil section, the fourth airfoil section, the fifth airfoil section and the sixth airfoil section, wherein the maximum relative thicknesses of the airfoil sections are different, the maximum relative thicknesses of the first airfoil section, the second airfoil section, the third airfoil section, the fourth airfoil section, the fifth airfoil section and the sixth airfoil section each range from 15% to 35% from the blade tip portions to the blade root portions, and each airfoil section comprises an S-shaped pressure face. All the airfoil sections are blunt trailing edges. The design Reynolds number of each airfoil section is 1*10<6> to 4*10<6>. The design attack angle of each airfoil section is 6 degrees or 7 degrees. The airfoil section family is mainly used for most of the regions, with the wind power density level of 2 to 4 and the annual average wind speed of the 50-meter-high position ranging from 6.4 m/s to 7.5 m/s, in inland China, and the wind energy utilization rate of blades in low-wind-speed areas can be increased.

Description

technical field [0001] The invention belongs to the technical field of aerodynamic airfoil design, and in particular relates to a low-wind-speed airfoil family of a wind power generating set. Background technique [0002] The working principle of the wind turbine is to convert wind energy into mechanical energy through the blades, and then transfer the mechanical energy to the wind turbine through connecting devices such as hubs, shafts and gearboxes, and finally the generator converts the mechanical energy into electrical energy and transmits it to the grid for use by users. Blades are one of the core components of wind turbines. The design process of the blades of the unit is to stack the airfoil along the blade span according to a certain twist angle, chord length and thickness distribution, so the aerodynamic performance of the airfoil has an important impact on the wind capture ability of the wind turbine. It directly determines the wind energy utilization efficiency o...

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Problems solved by technology

Domestic new airfoil design research started late, lack of new airfoil design da

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