Transition profile calculation method for variable cross-section shape high-speed wind tunnel test section

A technology of high-speed wind tunnel and test section, which is applied in the field of wind tunnel test, can solve the problems such as the change of flow field characteristics in the wind tunnel test section, achieve the effect of expanding the local area of ​​the working space, simple design method, and expanding the test field
CN112556970AActive Publication Date: 2021-03-26INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
5 Cites 11 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
Publication Date
2021-03-26

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a transition profile calculation method for a variable cross-section shape high-speed wind tunnel test section. According to the transition profile calculation method, a cubiccurve, a bicubic curve and a quintic curve are adopted to design a transition profile; through computer numerical simulation, speed distribution cloud charts of rectangular section test section inletsof transition profiles of the cubic curve, the bicubic curve and the quintic curve are obtained respectively, whether a test section flow field meets high-speed wind tunnel test requirements or not is evaluated, curves which do not meet the requirements are excluded, and curves which meet the requirements are reserved; and machining process evaluation is carried out on the curves meeting the requirements, and the cubic curve is determined as the molded line of the transition profile. The transition profile calculation method is suitable for transforming an existing high-speed wind tunnel, expands the test field of the existing high-speed wind tunnel, and has high adaptability and high application value.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to a method for calculating a transition profile of a variable cross-section high-speed wind tunnel test section. Background technique

[0002] A wind tunnel is a ground pipe-like device that artificially generates and controls airflow, and is mainly used for the research of aerodynamic performance of aerospace vehicle models under different attitudes or different flow conditions. In a high-speed wind tunnel, the wind tunnel test section is the basic platform for carrying out various tests and providing aerodynamic measurement and pressure distribution measurement for different types of tests. Due to the wide variety of tests and different test purposes, a single wind tunnel test section cannot complete the test tasks of all projects. Therefore, for specific test content and projects, it is necessary to build a corresponding wind tunnel test section to meet the...

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