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

Aircraft surface leading edge attachment line area extraction method

A technology of aircraft and attachment lines, which is applied to instruments, image data processing, electrical digital data processing, etc., can solve problems such as the discontinuity of the attachment line area, and achieve the effect of improving accuracy and capturing applicability

Pending Publication Date: 2021-11-12
中国空气动力研究与发展中心空天技术研究所
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a method that can quickly and automatically extract the attachment line area of ​​the characteristic leading edge of the aircraft, effectively solve the problem of discontinuity in the attachment line area extracted by the existing method, and improve the accuracy of engineering methods to calculate the aerodynamic thermal environment

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
  • Aircraft surface leading edge attachment line area extraction method
  • Aircraft surface leading edge attachment line area extraction method
  • Aircraft surface leading edge attachment line area extraction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] Embodiment: A method for extracting the area of ​​the attachment line on the leading edge of the aircraft surface, based on the geometric shape characteristics of the aircraft and the surface inviscid flow field, combined with the Jacobian matrix discriminant ("discriminant method") of the surface linear vector field and the discreteness of the geometric shape Curvature jointly judges the attachment flow area of ​​the aircraft leading edge, and the extracted attachment line area is continuously distributed at the characteristic leading edge of the aircraft, as shown in figure 1 As shown, it specifically includes the following steps:

[0029] S1. Discretize the surface of the aircraft into unstructured triangular grids, use the triangular unstructured grids to define the surface outer mold line of the aircraft, obtain the surface linear vector field through the inviscid flow field parameters on the aircraft surface, and calculate the aircraft surface through the triangula...

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 discloses an aircraft surface leading edge attachment line area extraction method, and relates to the technical field of aerodynamic thermal engineering. According to the technical scheme, based on aircraft geometric appearance characteristics and a surface non-viscous flow field, the attachment flow area of the leading edge of the aircraft is jointly judged by combining a Jacobian matrix discriminant of the surface linear vector field and the discrete curvature of the geometric shape, wherein the extracted attachment line areas are continuously distributed at the characteristic leading edge of the aircraft. According to the invention, the continuously distributed characteristic leading edge attachment line flow area can be rapidly and automatically extracted, the change of the position of the attachment line area can be captured when the flight working condition changes, and the capture applicability to the attachment line areas of different types of aircrafts is good; the invention is used for aerodynamic thermal environment engineering calculation, the aircraft characteristic leading edge sweepback cylinder heat flow calculation formula of the attachment line area can be conveniently determined, and the accuracy of characteristic leading edge aerodynamic thermal environment calculation by the engineering method is improved.

Description

technical field [0001] The invention relates to the technical field of aerothermal engineering, and more specifically, relates to a method for extracting the attachment line region of the front edge of the aircraft surface. Background technique [0002] The engineering method combined with Reynolds comparison and reference enthalpy method is an important method for fast calculation of aerothermal environment. During the aerodynamic heating process, the aerodynamic heating phenomenon is most obvious in the stagnation point and the attachment line area of ​​the leading edge of the hypersonic vehicle. Whether the attachment line area can be extracted quickly and accurately will directly affect the efficiency and reliability of the aerothermal engineering calculation method. [0003] Attachment lines are mainly obtained through two methods: user observation and feature detection. The characteristic leading edge areas of hypersonic vehicles (such as the leading edge of the wing ...

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
IPC IPC(8): G06F30/28G06F30/15G06T3/00G06F113/08G06F119/14
CPCG06F30/28G06F30/15G06F2113/08G06F2119/14G06T3/067Y02T90/00
Inventor 李正洲马志成张小庆高昌周正吕金洲王琪曲俐鹏
Owner 中国空气动力研究与发展中心空天技术研究所
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