Unlock instant, AI-driven research and patent intelligence for your innovation.

Hypersonic-velocity embedded waverider design method

A design method and hypersonic technology, applied to supersonic aircraft, aircraft parts, ground devices, etc., can solve the problems of high lift-to-drag ratio and difficulty in taking into account high volume ratio, and achieve high volume ratio requirements and high lift-to-drag ratio requirements , to avoid adverse effects

Active Publication Date: 2019-12-03
BEIHANG UNIV
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the previous analysis, it can be known that the traditional waverider design method adopts the concept of span-wise integration design, which has inherent contradictions, and it is difficult to balance high volume ratio and high lift-to-drag ratio

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
  • Hypersonic-velocity embedded waverider design method
  • Hypersonic-velocity embedded waverider design method
  • Hypersonic-velocity embedded waverider design method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] With the current Mach number 5.0 and the angle of attack 4° as the design state, the aerodynamic layout design of the embedded waverider aircraft is carried out.

[0038] First, the shape of the fuselage needs to be given as the basic body. Because the fuselage mainly considers the characteristics of high volume ratio, a typical slender body shape is adopted as the fuselage shape. The cross-sectional shape of the fuselage adopts a closed supercircular curve, and the side of the fuselage head adopts a tangent oval line. The designed fuselage shape is as follows: figure 1 shown. Then the leading edge line of the embedded waverider is given. The leading edge line is a single straight line, which is located in the horizontal plane at half the height of the fuselage. The sweep angle of the leading edge line is 60°, the distance from the most forward point to the vertex of the fuselage head is 4.3D, and D is the diameter of the fuselage. Only considering the case where the ...

Embodiment 2

[0043] Since the flow Mach number is 5.0 and the angle of attack is 4° as the design state, consider the situation that the wing span is larger than the shock wave range of the fuselage head, that is, part of the wing is located in the shock wave range of the fuselage head, and part of the wing is located in the fuselage head shock range. Embedded waverider wing design is carried out outside the scope of the internal shock wave.

[0044] The fuselage adopts the shape of the fuselage obtained in Example 1. The waverider leading edge line is two straight line segments with segmental sweep. Among them, the sweep angle of the inner straight section close to the fuselage is 65°, and the straight section is located in the flow field behind the shock wave of the fuselage head as a whole; the sweep angle of the outer straight section far away from the fuselage is 52°, and the straight section along the The shock wave spanwise across the nose of the fuselage enters the free stream.

...

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 provides a hypersonic-velocity embedded waverider design method. The method is proposed based on a partial decoupling thought. Compared with a traditional method, a basic body that generates a shock wave flow field is as a fuselage in the design method, while the basic body in the traditional method is not a component of a final aircraft. The hypersonic-velocity embedded waverider design method breaks through the category of the traditional design method that the fuselage and a wing must be designed in an integrated span on the basis of the flow field of the same shock wave intensity, the fuselage is regarded as a high-volume component, the wing is regarded as a high-lift-drag ratio component, and therefore, the fuselage can be designed based on higher-strength shock waves, and even the waverider design is not considered. The wing is based on the fuselage flow field to construct the embedded waverider reference flow field for the waverider design. According to the designmethod, a pneumatic layout of the hypersonic-velocity aircraft with both high volumetric ratio and high-lift-drag ratio can be obtained.

Description

technical field [0001] The invention belongs to the field of hypersonic aircraft design, in particular to a design method for a hypersonic embedded waverider. Background technique [0002] The waverider layout is a form of hypersonic aircraft layout that enables the shock wave to attach to the leading edge and the high-pressure gas behind the wave to be located under the body without leakage. It has higher lift-drag than wing-body combination or lift body layout Therefore, it has received great attention from researchers all over the world. [0003] Since Nonweiler proposed the concept of waveriders in 1959, a variety of waverider design methods have been proposed. Generally speaking, the basic idea of ​​the traditional waverider design method is to construct a basic body first, and obtain the shock wave flow field generated by the basic body under the design conditions, and then apply streamline tracing and other methods in the shock wave flow field to obtain the multiplie...

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 Applications(China)
IPC IPC(8): B64F5/00B64C30/00
CPCB64C30/00B64F5/00
Inventor 蒋崇文罗磊许晨豪高振勋李椿萱
Owner BEIHANG UNIV