Method and system for reverse curvature correction of airfoil spline curve of turbine blade
A technology of spline curves and turbine blades, applied in general control systems, control/regulation systems, program control, etc., can solve problems such as labor consumption, reduced modeling efficiency, and inability to guarantee the stability of design quality
Inactive Publication Date: 2020-11-17
北航(天津武清)智能制造研究院有限公司 +1
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This method has a certain degree of randomness, cannot guarantee the stability of the design quality, and requires a certain amount of human labor, which reduces the modeling efficiency
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[0070] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.
[0071] In one embodiment of the present invention, a method for correcting the reverse curvature of the airfoil spline curve of a turbine blade is provided, figure 1 The overall flow diagram of the method for correcting the reverse curvature of the airfoil spline curve of the turbine blade provided by the embodiment of the present invention, the method includes:
[0072] Calculate and obtain the node vector and control vertex information of the airfoil spline curve according to the interpolation point data...
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The invention provides a turbine blade profile spline curve reverse curvature correction method and system, and the method comprises the steps: obtaining the node vector and control vertex informationof a blade profile spline curve through calculation according to the interpolation point data of the blade profile spline curve of a turbine blade; calculating a second-order guide vector of the blade profile spline curve at each interpolation point as a curvature vector; determining a control vertex to be adjusted according to the curvature vector at each interpolation point, and adjusting the position information of the control vertex; and constructing an adjusted blade profile spline curve based on the position information of the adjusted control vertex. According to the method, the control vertex of the blade profile spline curve is kept convex by slightly adjusting the control vertex on the blade profile spline curve within a small adjustment range, so that the situation that the curvature of the blade profile spline curve is reverse is automatically eliminated, the modeling efficiency of the blade profile spline curve is remarkably improved, and the influence of human factors inthe modeling process is reduced.
Description
technical field [0001] The invention belongs to the technical field of curve smoothing, and in particular relates to a method and system for correcting the reverse curvature of a blade-shaped spline curve of a turbine blade. Background technique [0002] During the modeling process of turbine blades, designers use spline curves to interpolate model points to generate blade profile cross-section lines (also known as blade spline curves) that are interpolated to model value points. Due to possible reasons such as insufficient data accuracy of the profile point and inconsistent parameterization methods between the modeling software and the analysis software, after generating the airfoil section spline, it is necessary to check the curvature vector distribution of the airfoil line and observe the fluctuation of the airfoil line. If the curvature vector of the section line is reversed, the designer can manually adjust the original interpolation point until the curvature vector of...
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IPC IPC(8): G05B19/4103
CPCG05B19/4103G05B2219/33078
Inventor 王伟萧啸龙
Owner 北航(天津武清)智能制造研究院有限公司