Blade parameterization design method

Abstract

The invention discloses a blade parameterization design method, which relates to the field of blade design, and comprises the following steps: step 1, generating a 2D blade contour for each layer along the radial direction, and determining five points on a blade according to the 2D blade contour through 11 parameter methods; 2, the 2D contour is converted into 3D, a 3D blade is generated along a stacking line, firstly, the radial balance condition is used for determining the metal angles of blade inlets and outlets at different radial interfaces of the blade from the blade root to the blade tip, and secondly, a 3D Bezier curve is used as the stacking line of the blade contour to generate possible forward inclination and sweepback. According to the blade parameterization design method, the smooth blade model can be efficiently generated.

Description

technical field [0001] The invention relates to the field of blade design, in particular to a parametric design method for blades. Background technique [0002] At present, the methods of parametrically generating the blade surface include: such as using Casey’s Bezier-patches method (a baseline design and disturbance function superposition), and Zhang and He’s combination method combining arc and thickness function distribution, Arnone et al. Human work, and the general parametric airfoil function proposed by Kulfan. The main disadvantage of these methods is the lack of definition of the physical meaning of the design variables. The main difference between Pritchard's 11-parameter method and the method used in this study is that curve 2 in Pritchard's method (the suction surface curve downstream of the throat is a circular curve), means that the trailing edge wedge angle value ε TE Depends on other design variables. [0003] The main problem of existing methods is the la...

AI Technical Summary

Problems solved by technology

[0003] The main problem of existing methods is the lack of parameterization with physical meaning

In the Pritchard method, although a piece of shape can be generated, because curve 2 is a circular arc, it has great restrictions on the geometry of the blade, which affects the performance improvement space of the blade, and the blade shape with a smooth sound field cannot be obtained.

Images