Wind machine blade airfoil family

Abstract

The invention discloses a wind machine blade airfoil family which comprises airfoils with different relative thicknesses from the first one to the fourth one, the relative thickness is the ratio of the maximum distance to chord length between an upper surface and a lower surface of each airfoil, and the chord length is the length of a chord line from the leading edge to the tail edge of each airfoil; and each airfoil comprises the leading edge, the tail edge, a suction surface, and a pressure surface. The leading-edge radius of the wind machine blade airfoil family is 10.203%-15.345% of the chord length, the thickness of the tail edge is 5%-11% of the chord length, the relative thickness is 45%-60% of the chord length, the position of the maximal relative thickness is at the position awayfrom the leading edge for 32.1%-33.2% of the chord length, and the pressure surfaces are four different S-shaped after loadings. The geometry shape of each airfoil for the wind machine blade airfoil family is formed by dimensionless two-dimensional coordinates of each point on the pressure surface and the suction surface of each airfoil in smooth connection, and the dimensionless two-dimensional coordinate is the ratio of the horizontal coordinate and vertical coordinate to the chord length of each point.

Description

Technical field [0001] The present invention involves a wing -wing type of a wind machine, which specializes in a dull tail -thick wing type of a wind machine blades. Background technique [0002] With the increasingly prominent world energy issues, wind energy as environmental friendly renewable energy has developed rapidly.The blade of the wind power machine is the core component of the wind turbine, and the blades are made by the wing type along its exhibition. Therefore, the quality of the wing properties directly determines the quality of the wind power unit performance.With the continuous large -scale development of wind turbines, the leaves are getting longer and longer, especially the roots of the blades have higher requirements for the structure and aerodynamic characteristics of the wing type. Therefore, the design and development of thick -wing type and blunt tail wings have become an inevitable demand. [0003] Increasing the thickness of the wing type can improve the...

AI Technical Summary

Problems solved by technology

[0003] Increasing the thickness of the airfoil can improve the structural characteristics of the airfoil, but as the thickness of the airfoil increases, the aerodynamic performance of the airfoil will decrease, such as the maximum lift coefficient and maximum lift-drag ratio of the airfoil will decrease, and the leading edge of the airfoil will be rough sex will increase etc.

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