Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Parametric Modeling Method for Airfoil

A parametric modeling and parametric model technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve numerically unstable abnormal airfoils, supercritical airfoil trailing edge description is not very accurate, etc. problems, to the effect of providing accuracy and reliability

Active Publication Date: 2019-01-18
CHINA AIRPLANT STRENGTH RES INST
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first is that the description of the trailing edge of the supercritical airfoil is not very accurate, and the second is that numerical instability is prone to abnormal airfoils

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Parametric Modeling Method for Airfoil
  • A Parametric Modeling Method for Airfoil
  • A Parametric Modeling Method for Airfoil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] Below by embodiment the present invention will be further described:

[0038] PARSEC airfoil parameterization scheme see figure 1 , see the parameterization scheme of Bezier curve airfoil figure 2 , the airfoil parametric modeling method of the present invention is to establish the relationship between the Bezier curve and the aerodynamic characteristics of the airfoil, and introduce the leading edge radius r in the PARSEC method le , the upper vertex coordinates (X UP ,Z UP ), the upper vertex curvature (Z XXUP ), the lower vertex coordinates (X LO ,Z LO ), the lower vertex curvature (Z XXLO ), trailing edge angle α TE , trailing edge angle β TE , trailing edge thickness △ Z TE , trailing edge height (Z TE ) controls the shape of the airfoil. figure 2 , the upper and lower airfoil curves consist of six control points P 0 , P 1 , P 2 , P 3 , P 4 , P 5 , P 6 The generated two third-order Bezier curves are composed. In order to distinguish the upper an...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to aerodynamic configuration design technologies for aerocrafts and particularly relates to an airfoil profile parametric modeling method for the aerocraft. According to the airfoil profile parametric modeling method disclosed by the invention, the relationship between a Bezier curve and aerodynamic characteristics of the airfoil profile is established; an airfoil profile parametric model is constructed by adopting a four-section and three-order Bezier curve, so that the characteristics of the Bezier curve and PARSEC are integrated; the aerodynamic characteristic correlation of the PARSEC method is retained, and the stability and the universality of the Bezier method are realized, so that the accuracy and the reliability of an airfoil profile model of the aerocraft are effectively provided. The airfoil profile parametric modeling method disclosed by the invention is simple in programming; the generation speed of a new airfoil profile is higher; the airfoil profile parametric modeling method can be applied to the optimized design of the aerodynamic configuration of the airfoil profile and the airfoils and provides a powerful tool for the airfoil type design of the aerocraft.

Description

technical field [0001] The invention belongs to the aerodynamic shape design technology of an aircraft, in particular to a parametric modeling method for an airfoil of an aircraft. Background technique [0002] Aviation aircraft airfoil design has always been a difficult point in aircraft aerodynamic shape design. With the continuous development of modern computer technology, more and more CAD-based mathematical modeling methods are used in aircraft airfoil design. [0003] The Bezier curve is a parametric curve widely used in CAD, FEA, CFD and other fields. It is a common method used in the field of computer graphics to describe complex shapes. Venkataraman first introduced the Bezier curve to the parameters of the airfoil Later, this airfoil parameterization method based on computer graphics has been more and more in-depth research in the optimal design of airfoil and airfoil surface. The biggest feature of the Bezier curve parametric airfoil is that it can be seamlessly ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 李军鹏
Owner CHINA AIRPLANT STRENGTH RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com