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Double-sweepback waverider design method of fixed plane shape based on projection method

A technology of plane shape and design method, which is applied to ground devices, supersonic aircraft, aircraft parts, etc., can solve the problems of difficult engineering application, poor lift-drag, and no wave-riding characteristics, and achieves the design method. The effect of flexible, simple geometric expression and good smooth transition characteristics

Pending Publication Date: 2020-05-15
HUNAN AIRTOPS INTELLIGENT TECH CO LTD
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Problems solved by technology

[0003] The aerodynamic performance of the waverider is better at hypersonic speeds, especially in the design state, but it does not have waveriding characteristics at low speeds, and its lift and drag are relatively poor. To achieve wide-speed flight, start from zero speed to hypersonic flight , which is more difficult in engineering applications

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  • Double-sweepback waverider design method of fixed plane shape based on projection method
  • Double-sweepback waverider design method of fixed plane shape based on projection method
  • Double-sweepback waverider design method of fixed plane shape based on projection method

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Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0035] An embodiment of the present invention provides a method for designing a double-swept waverider based on a projection method to determine a plane shape, including the following steps:

[0036] Step 1: Design the parameters of the waverider with free flow surface, compression surface and rear end surface perpendicular to the flow direction.

[0037] Step 2: Design the plane shape of the leading edge of the waverider as a double-sweep form, the leading e...

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Abstract

The invention provides a double-sweepback waverider design method of a fixed plane shape based on a projection method. The double-sweepback waverider generated by the method has waverider characteristics and high-attack-angle nonlinear lift force at a high speed, the lift force amplification is as high as 22.41% at a 20-degree attack angle, the lift-drag ratio reaches 7 at a low speed, a vortex wave effect is achieved to improve the lift-drag ratio, and the aerodynamic performance of a wide speed range is achieved.

Description

technical field [0001] The invention relates to the field of aerodynamic design of hypersonic aircraft, in particular to a method for designing a double-swept waverider based on a projection method to determine a plane shape. Background technique [0002] In the history of aircraft development, the lift-to-drag ratio is one of the important comprehensive technical indicators for evaluating aircraft. Continuously improving the lift-to-drag ratio of aircraft is the relentless pursuit of scientific researchers in the aerospace field. The development of the aerodynamic shape of the aircraft has experienced three main shapes: the spin body, the lift body and the waverider body. One of the main driving forces for its development is the high lift-to-drag ratio. After statistical analysis of various aircrafts that had been successfully designed at that time, Kuchemann established an empirical formula for the change of maximum lift-to-drag ratio with flight Mach number: Analysis of...

Claims

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Application Information

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IPC IPC(8): B64C1/00B64C30/00B64F5/00
CPCB64C1/0009B64C30/00B64F5/00
Inventor 罗世彬王逗易怀喜
Owner HUNAN AIRTOPS INTELLIGENT TECH CO LTD
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